Global communities have also resulted in precisely the opposite of expectations. They created collections of uniform behavior. I would argue the private moderated communities allow for far greater diversification of ideas.

The reason being is that you can exist in multiple such communities. The individual experiences the diversity and not the community.

It is the premise of an argument I laid out some time ago for why social media has been destructive to diverse views even without the algorithmic manipulations.

https://www.mindprison.cc/p/uniform-thought-machines