You’re underestimating both the size and the heterogeneity of those cultures. Politics attains anywhere with a population that exceeds Dunbar’s number, and both of those cultures were easily in the tens to hundreds of thousands. They’re also just two examples out of many - most of human civilization has managed to handle this over time.

And, yes, the solution here is in fact that we change our behavior and build political alliances, starting at the local level and building up. The datacenter fights are a good place to look if you’d like a blueprint, as are the anti-Flock movements, and Minneapolis if you want to see what sharper action looks like. I don’t know what else you’re expecting with regards to “what to do” - I’ve never heard of any effective magic wand, any solution here involves getting off your ass and advocating for what you want.

And, we hack this the way we hack everything else: by actually understanding the system and how it works, not just listening to what we’re being told by the people who built the system, by identifying places of high leverage within the system, and by using those to enact change in the system. To just sit around and say “well, my Econ professor said we’re fucked, so I guess that’s that” is just fucking lazy.