Some of this sounds more like an issue with use cases and front end applications than with Nostr itself. Of course a social media client is going to be more individual focused, and hierarchical to some degree. I'm one dude posting to the void about many topics. But it seems like you could build Reddit on Nostr too. The social media use case just happens to be the most funded and used, as far as I can tell. I can imagine topic based relays where a particular client only accesses those relays and notes. Like a cigar relay isn't somewhere I'll go to talk about other stuff. I'd open that client specifically to talk and read about cigars. I don't use the major social media clients that way.
