That’s a good point, muting an account mutes all their interactions, not only the bad ones (considered bad by whoever blocks you, not objectively bad). But it can be fixed by creating a different account and using it to talk about lightning, without it affecting your search.
Discussion
Switching to a new npub would impact my reach due to the follow based system
+ another issue: nostr doesn't reliably keep posts long term, my main npub has Primal taking care of that which they probably won't do for additional npubs because they seem to hate me