There isn't deletion but there's repudiation. Like when nostr gets key rotation ... eventually ... one day.

Either the UX needs to change to reflect how Nostr actually works, or users need to realize what they actually want (which is probably a network of servers which have real access control lists like Urbit etc)

Don't blame it on "UX" if you don't understand the fundamentals.

If the UX is good, no education is needed. In the case of Nostr, education is needed.