[mftrhu]

I don't see anything wrong with the people who manage and pay for the server - usually for themselves and their friends, or because they are passionate about decentralization, and hardly ever because they set out to provide a platform for everyone to be able to say everything to anyone else - to be able to decide who their server will interact with.

In the fediverse, after all, users who don't like that decision can always move to another instance, or set up their own - you can't do that on twitter, HN, Reddit, and the barrier to entry for setting up one's e-mail server is high enough that the capability to do that is only theoretical.