The only way to form communities is to make relays different from one another.

The only way to make relays different from one another is for them to accept and/or forward some messages to some clients while rejecting and/or not forwarding some messages to other clients.

And the only way for THAT to happen is some kind of user persistence on relays, which kinda sorta exists already with profiles, but it's going to have to be more of a community thing.

Clients will need to have views for single ("primary"?) relays instead of just global and following.

And by that point, you've reinvented fedi to some extent, except the user has his own key instead of his identity belonging to a node.

All that to say that yeah, Nostr by its nature encourages an amorphous blob of pseudo-culture that really isn't interesting at all, kind of like a world where everyone is part of the same, amorphous blob of mixed race (coming soon!)