Your mute list is just a collection of npubs you personally don’t want to encounter. Not remotely the same thing as someone building a bot/team to monitor bad/unworthy accounts and to serve on purpose as a signal to others to avoid.
Sure, those lists are a bunch of randos now that don’t affect you, but if you get put on the “bad” list and suddenly you’re reaching 1/10th of your former audience, you might care quite a bit. It’s Linda Yaccarino saying, “Freedom of speech doesn’t mean freedom of reach to justify Twitter throttling certain accounts.”
It *should* be reputational suicide IMO to try to turn nostr into that, no matter the ostensible greater good of the purported motivation.