Inteeesting point about overemphasis on one problem area. It is a weakness. 

I think this would be a good reason to go back to the idea of communities in Nostr land. It makes me think Like stack exchange. For them creating communities, it’s defined through a unique combinations of tags. That specific combo defines a community. The unique thing is how to share that definition on a non centralized platform., or how to rename that definition by consensus over time? 

Anyway if these communities existed you could discover them. And if a tag is in more than one community you may discover other communities that one one shared tag with another interest area of yours?  If there was a way to look up which communities have been defined including that tag? 

Just some random thoughts.