It’s all in pennies, dig in

Black-red is anarcho communist.

Other one is the egoist flag.

We are trashgirlfriend.

We are many.

We have no idea how to operate a nuclear power plant.

Topics are almost never as discrete as the author pretends them to be. Often they overlap, but only partially.

Maybe I am not fully understanding your point here but from my point of view this is just not true?

A lot of the traffic is going to be on very general topics like “memes” or “technology” where posts are going to fit pretty much every other similar community.

Plus, in this case whoever has the authorities to follow communities can decide if the posts fit, so you’re not losing anything if posts from a more specific community like “wholesome memes” end up showing up in a more general “memes” community.