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Some infrastructures need to be coordinated. If every community choose a different "train line width", the train connection became useless.
I think in cryptocurrency world we have great examples of coordination/consensus without a "classic government"/"single poin of failure".

why do you assume that there is no coordination in the free market?

Most likely it's all about the fear that everybody will use different standards and government is the best way of having a single standard cover the whole country.

Still somehow pretty much everybody in the world is doing well with such a small thing as USB standard without government telling us to use it.

we are light years behind from that.

We still haven't a worldwide electricity plug and measurement system, communities and people are stupid. Reaching a consensus without government is the hardest part

Even though government is controlling things like that, they still haven't got a worldwide electricity plug :)

Because communities and government do not want to lose their power. It's easier to build an adaptor than reach the consensus, sit everybody at a table and say: "this is the worldwide standard, if you don't invent something really innovative please stick with it". Maybe DPOS is the most efficient form of governance :D

We still haven't a worldwide electricity plug and measurement system,

yet we have government all around the globe and they can't manage to do it. So this is an argument in favor on anarchy since it shows the incompetence of governments.

and people are stupid.

if people are stupid how they can be trusted to elected even stupider people to control them?

Reaching a consensus without government is the hardest part

no need for consensus. it arises naturally with or without a government.

communities and people are stupid. Reaching a consensus without government is the hardest part

yet we have government all around the globe and they can't manage to do it. So this is an argument in favor on anarchy since it shows the incompetence of governments.

In anarchy it's even worse to reach the consensus.

I'd like to delegate my vote in certain areas to people smarter than me. the problem with democracy, dictatorship and anarchy is that somebody have to make decisions for others and most of the time he/she is incompentent

In anarchy it's even worse to reach the consensus.

how do you know if it had never existed?

I'd like to delegate my vote in certain areas to people smarter than me.

how do you know if they are smarter than you? Because average dumb people voted?

the problem with democracy, dictatorship and anarchy is that somebody have to make decisions for others and most of the time he/she is incompentent

well, isn't that self contradicting..

Anarchy never scaled with big communities of people.
Also internet which started like a decentralized/anarchy system (a sorta) now the biggest part is controlled by a few companies.

If a person show to be compentent to a field I marginally know I would delegate my decision to him. If he isn't able to fix or manage the problem I'll revoke my vote.

Average dumb people vote for somebody which promise everything to everybody, if you could vote for somebody in a specific area it would be easier to understand and measure it's performances

Even though I understand your concern, you can see how private markets and private consumers can handle what they are buying.

If I'm upgrading my PC, I won't buy an AMD processor for Intel motherboard.

If I'm building a railroad and buy trains, I'm pretty sure I could work it out that it benefits me (and others) the best way.

The magic word here is; IF ;)

We still haven't a worldwide electricity plug and measurement system, communities and people are stupid. Reach a consensus without government is the hardest part

Who is we?

Is worldwide electricity plug and measurement system needed? And according to who?

If communities (which are a group of stupid people) and people are stupid.
What are those in government?

Under "government" you never ever reach consensus. Goverment is, that one group forces the other group to do what they want with violence or the threat of violence.