It's natural human instinct to seek tribes.
You are suggesting you know better than a system that millions of years of evolution have created. You are also assuming that you know all the risks of NOT organising in tribes, that somehow if all humans were some untribal lonely individual entities, the world would work better. Many many billions of people and animals seem to disagree.
All of these thing you mention are simply attempts to attenuate evolution, not conquer it. Moreover, all of the things you mention are a new feature set developed from evidence given to us by evolution.
About the only area where biological evolution is relevant now is pathogens, because these evolve on timescales comparable to technological development of humans.
Humans managed to create a means to communicate with each other. End of evolution right there. We figured out germ theory and then vaccines. The DEATH of human evolution. We have the Internet now so that must mean human evolution just stops, because integrated circuits or something.
We look back on proto-humans, who had many tools, with the same arrogance. There’s no reason our species won’t evolve further to look back on the “internet” and laugh.
Timescales, huh.
Evolution for humans just doesn't matter, because at this point, we're doing meaningful changes to ourselves and our environment at a rate faster than it takes for a human to reach reproductive age. We didn't wait for evolution to adapt us to colder climate, fix our eyesight or change melanin levels; we just developed clothes, glasses and sunscreen - which also made these features not influenceable by natural selection pressures. And whatever mutation happens that doesn't kill a person, we work around it socially or technologically - which means its impact on reproductive fitness is usually close to zero. Biological evolution is no longer the force driving the shape of our species.
There is an evolution of humans happening, but it's social and technological, not biological.
You simply can't just say these don't matter any more, because it's ignoring reality. Every time you're turned on by someone attractive, its evolution thats doing that. And good luck thinking rationally when you are truly in love. (or to take a different example, when your body has a temperature in reaction to a disease. Good luck overriding your absolutely terrible mental state with rational human thought).
I think what you're missing is that... nobody in this thread is saying that.
In any case, I think we have managed the counter the forces of natural selection that affect our physical health, but not those that affect our mental health.
I'm suggesting that it might be wise to try to keep our baser instincts at bay -- as well as we can, at least. Sure, we'll fail from time to time (or often even), but that doesn't mean we should give up that struggle.
The internet has created other strongly bonded echo-chambers. Elon Musk lovers/haters for example.