There is a crucial difference. The cool thing of the Fediverse is that there is no central authority. There is no CEO pushing things in one direction or another to try to maximize revenue. We have here the potential for real diversity of groups and interests, but (so far) all we seem to be getting is a very tiny vocal minority that wants to complain about anything that resembles the mainstream but is unable to build an alternative.

I’m tired of Carl Sagan’s atheists using Darwinism as basis for lack of a God,

You are reading too much into the quote. I just pointed out that faulty logic. Nassim Taleb also talks a lot about this