
This is one of those weird questions.
Why does "communism" even exist?
The reality does not match the sales pitch.
And it can't. Logically (human logic) it can't.
(now, maybe if we were ants, and had hive logic, communism is just the way we would think)
And, if communism cannot logically exist, then were did it come from?
Why does it exist? Why is there a group of people that are so hell bent on getting communism, that they would spend centuries corrupting govern-cement and schools to corrupt the young. To indoctrinate them into thinking that communism can exist. (they had to take logic out of the school curriculum)

Communism - definition
"That wasn't real communism!"
Communism is a form of gover-cement where the govern-cement owns/controls all the means of production.
It is not an existence where nobody owns anything and everyone just shares.
It is not an existence where the workers own the means of production.
It is an existence where the govern-cement owns everything, and everyone owns nothing.
An existence where a person, can at any time, have the things that they thought were theirs. Family heirlooms, pictures, kitchen utensils, the apartment they lived in all their life… all can be removed by the state. You do not own anything, and the govern-cement makes no pretences that you do.
Of course, there is the other definition of communism, the place where all the good sounding parts of communism was stolen from. Communes. Communal living. Or basically large family groups. Where certain members of the group look out for, and provide for the group. And each member does what they can to support the group.
Sounds great to have someone looking out for you. However, this doesn't scale. The people in govern-cement are so removed from the masses, that they cannot care. Further, in the commune, there is lots of ownership. There is lots of shared property. But, in total, the commune owns everything. And it becomes very apparent when any one person is hurting the commune.

Communism cannot exist because people get attached to things
One of the core tenants of Communism is that no one owns anything. Property rights are abolished.
This is why communism is anti-human logic. A human becomes attached to things. And works to create those things. And that person feels it is theirs. This is just the basics of how a human operates.
Two people can make mugs out of clay, and each will have a preference for the mug they made. Even with the little imperfection. Maybe, especially with the imperfection.
A child will often have a favorite blanket. Something that as soon as they feel it, they become much calmer.
People get attached to where they are staying. And often will not move to a better place because they cannot bear to leave the place they are at. It is the old trope of trying to buy out an old person out of their house so that the big developer can build a mall, or skyscraper. If we didn't have this attachment, getting a check for 10x the value of your house would be a no brainer. Just go get yourself a better house. But that is not the way things work in the real world.

Communism cannot exist because people aren't really motivated for the "public good"
Now, don't get me wrong, people are very giving when they have their base needs met. But they do not work for nebulous goal of "the public good"
When there labor is taken away, and they really do not see how it is helping them directly, it lacks motivation. This is a problem that most large corporations are facing. When the actual end product is not in their purview, there is no motivation. When you are just a cog, you act like just a cog. You stop doing more than the bare minimum.
A person needs to see that the product they are working on is wanted and loved. They also need to see a correlation between work and income. (income could just be good feelings). But, when a person is separated from this, then we get soul crushing jobs. And that is all the jobs that exist under communism.
Communism IS soul crushing jobs. It follows from its definition, as surely as night follows day.

Communism cannot exist because of the Pareto Principal
Every worker is not equal to every other worker.
Some are good at one thing, others at another thing.
And even if the two specialize in the same field, one will be better at it.
In fact, one will be so much better as to produce 5x more work than the others.
Pareto Principal - 80% of the output is produced by 20% of the workers.
Now, if everyone is supposed to be a cog, then the star performer will learn to keep their head down and not exceed, or they will get removed. The communist govern-cement cannot tolerate these outliers. They are "bad for morale". And the star performer doesn't get anything extra by performing extra.
Thus, the communist system does not work with humans who are naturally diverse.

Communism is so alien to humans, that it has been postulated to have come to us from aliens who have a hive mentality.
Or, the other explanation is that those people in charge, the illuminati, those Mother WEFers, the Khazarian Mafia want complete control. They see all the humans, as we would see farm animals. Stupid, and they should just do their job. So, the people in charge reverse engineered a govern-cement system that would give them what they want. Them in complete control.
Either way, communism is not good for humanity.
"But, the brochure! Look at the brochure! Brotherly love, and everyone cares for everyone. Where we don't have to worry about starving!"
Except, starvation IS the outcome of communism. Communism + human nature = starvation. By definition.
Humanity shouldn't be discussing communism (as a govern-cement practice) except as a case study so that future generations can avoid this kind of trap.
But, here we are. With a large part of populations demanding for us to take up communism.
It is like some group of aliens are trying to get us to kill ourselves.

They don't have to burn books when nobody reads them.™
https://theanarchistlibrary.org/library/emma-goldman-there-is-no-communism-in-russia
https://theanarchistlibrary.org/library/petr-kropotkin-the-conquest-of-bread
https://theanarchistlibrary.org/library/alexander-berkman-what-is-communist-anarchism
Take a few whiles to look through at least the table of content of those.
You may begin to understand why they say 'that isn't real communism', because it wasn't.
What happened in the ussr and china had nothing to do with working together to make the world a better place for all of us.
I can lead you through the history of the name stealers stealing this name, too.
If you would like to have a better grasp on the reality of what happened back then.
There have been a few programs that sorta work like these books say. But not really.
I find free market capitalism gives the results desired better and easier. It really is about making people feel as if working together will benefit them. Right now, we need money / script, because our brains cannot see the whole network.
We also still have lazy people.
We also still have destructive people.
We also still have stupid people.
In a commune, you have to exclude those people, or it doesn't work.
We will need a system that motivates them, or at least minimizes their damage.
We carry the lazy people now.
The destructive would need to be dealt with by those they impact.
Stupid people can be accommodated.
We have the supply lines already in place.
The work people did today, they do tomorrow.
As long as the work gets done the shelves stay overflowing.
This work is separate from the billing layer.
The billing layer could fall in a lake and as long as the productive work continues, it will be as if nothing has changed.
If the local warehouse has it, you can have it.
They follow best warehousing practices.
You can order stuff online.
It will show up to your door.
All at no charge because the billing department fell in a lake.
Tell me adults couldn't pull this off.
People between the ages of 20 and 50 do the work to keep the shelves full.
~25k hours.
Maybe less once the robots are online.
The alternative is what we have.
A rat race that requires years of self deprivation to avoid the trailer park and cat food sandwiches.
Don't think I've ever more strongly agreed with one of your posts.
Particularly with decentralized means of production, this is the opposite of Communism. Instead of institutions, society would be empowered. Instead of overlords, people would have the power. That's the future I see coming as the means of production of modern goods and services become tabletop tech.
Rather than be owned as property, we the people will own the property.
Thanks!
It is the part i can really see coming. People becoming their own manufacturers.
And then, new products, new cars, new tech are shared all over, like files for a 3D printer. People just love sharing that stuff. Being part of a new thing. And then sharing it for more joy.
Capitalism and Communism will become old dusty words.
I do not know what the new systems will be called, in fact, in may just be called "being part of a family". But it will not be capitalism, except the "free market" part, and won't be communism, except that the family sees after its own (and can) and there is enough extra to make sure no one who tried, fails completely.
Indeed, decentralization and independent means of individual households is the end of 'isms', just as it is the end of all collectives. I have concerns about the ready mindlessness of the crowd, and see such weakness as a potential Achilles' heel of humanity.
I know too many good people that have swallowed bad ideas via such means.
Give Me abundancism!
Abundancism (10 min): https://odysee.com/@amaterasusolar:8/abundancism:8?lid=eeff9e0c80138ce03e22d76bcd5f2f873ff46b72
We are working on it. Becoming our own manufacturers.