Again it doesn't really matter because it's just the way it works, but it's also a feature for server admins. Imagine being harassed by someone, or imagine that person harassing your users, blah blah blah. Is there some hypothetical where this feature is abused in a super petty way? Sure. Welcome to all features in all software.
Let's take a gun as an example. You could use it to shoot a bad guy, but there are a lot of times where the person who got shot was a good guy, and a lot of other times it's by accident. The same goes for moderation - you can justify handing out the power to cut off connections between entire communities to random people by thinking of the ways it could be used for good but it doesn't get you out of dealing with the ways it can be used to harm.
You could say the exact same thing if federation could be forced. You can make whatever facile analogy you want; my point has always been there's bad scenarios no matter what.
