There's another component of this lurking beneath the surface of your remark, I think - instead of allowing our legacy to be defined by others who observed it - what can we curate or represent our legacies to be? We've never really that opportunity as a species for such longevity before - but with the more longevity that's out there - what truly remains significant?
The whole notion is - no one is really that special - and we're all just blobs of matter that can somehow think about all this stuff, unlike every other living thing on this particular planet.
I tend to the views of a nihilist in most things.
Very true, the generations before us didn't have the internet. Here we are with endless space and various ways to leave our almost meaningless mark behind which the internet provides us and most of us squander that oportunity. I'm of no delusion of my content being anything other than an afterthought to 99.9% of people. As time passes that 99.9% will grow to 100%.
Eventually, just like most everyone else, we will be forgotten. Its surprisingly hard to get the average person to understand the simple concept of being forgotten. Almost everyone I interacted with seems to think they will live forever and will be remembered forever.
Some view these beliefs as negative but I believe such belief contains positivity. So many people are self absorbed thinking their existance is more important than the next person beside them or more important then the ones before them. They don't even realize they have this veiw point sometimes. This causes them to make bigger deals out of small issues. Pointing out to them that the negative thing that is bothering them is just a moment in time that will be forgotten and is almost meaningless in the grand scheme of things usually goes over their head.