You can kick bigots off a Bluesky PDS.
But letting everyone label accounts and posts and run feeds of moderation advice is a lot quicker at booting someone from the virtual space than waiting around for someone to come and decide that yes, so-and-so really has broken BigPDSHost policy and shall be deleted. It's also a great way to find who you want to boot.
Echo chambers aren't that bad. I don't surround myself with people and things I like because the ones I don't like are going to hurt me, I do it because I don't like them and my life is too short to waste with their nonsense.