I entirely agree with your post, and feel like this is a pretty big problem with most of the Fediverse (with maybe the exception of Mastodon): it was not built with moderation in mind and now that it’s taking off, admins & users are unprepared for many possible types of abuse.
One of the many great things about the Fediverse (Mastodon, PixelFed, Lemmy, etc) is that your account is portable.
I know that’s true of Mastodon, I believe it might be true for PixelFed, but it’s definitely not the case for Lemmy (yet).