Why did Beehaw defederate from Lemmy.world and sh.itjust.works for poor moderation and not lemm.ee and discuss.online?

Seriously why? Discuss.online has horrible moderation and open-signups, and Lemm.ee isn't very much better. If lemmy.world and sh.itjust.works were completely nuked to avoid the moderation headache or risks from two large open servers, why aren't lemm.ee and discuss.online banned as well?