There’s a bit of choice paralasys when joining Lemmy. Even if you know how the fediverse works you won’t have knowledge of the culture and relationships of different instances.
I joined Lemmy.world because it advertises itself as the vanilla flavour of the fediverse, so it makes it an easy pick for someone like me who didn’t quite understand how it all hangs together.
But I do agree with you, and I’m looking to migrate after some concerning things have come up about the lemmy.world owner.