You're right. The way we design our social platforms has a gigantic impact on how people see each other, and talk to each other, and the impact that has on us.

Perhaps the problem isn't the self-reinforcement, but rather the platforms being designed more on instantaneous engagement and addiction rather than talking and human-level discussion.

We've devolved internet discourse into very simplistic, unintelligent, instant gratification that's friendly to advertising and monetization.

That makes a lot more sense, and why I think it's so important to think of this problem as a much bigger systemic ecosystem. The design of a platform or a system impacts how people behave; the ones we have now have just the right mix of characteristics to cause this sort of insular tribalism.

We can choose to design different ones.