Why don't you just block the communities yourself?

You have the ability to do that, but instead you're demanding that the instance admins take the choice away from you?

This is some nanny state shit. It's like saying "I don't want to see morally qiestionable things like drag shows, the government should ban them!" Like just block it and don't fucking go there if you don't want to see it. Don't advocate for taking the choice away from everyone.