The key here, is that relays are the only ones that can truly moderate content for a community because they can hard-delete, block universally, allow universally, define allowed or blocked keywords, manually curate, etc.
Everyone else can only issue events and hope for the best, but a relay is a real server and directly controls the data set on a machine. That's much more persistent.

And communities need to determine what they trust, and what they don't. Then individuals can choose a community whose moderation they prefer, or run their own. Because to trust data, is to value its usefulness and accuracy, but valuations are always subjective. 

 “Because to trust data, is to value its usefulness and accuracy, but valuations are always subjective.”
This is nicely put and consistent.

But you’re taking an orthogonal step away from other approaches to digital Search if you further follow this road. You must make it clear to client developers that they may need to check content again.
Because the end-user conducting a RAG search may or may not to be protected from forged results. That’s a difficult UX question to answer.