When those "someone"s are reasonable, sure, it won’t be bad, but when they’re not? Give the power of federation to a few instances, and that’s not just a possibility, but an inevitability.
We already know Meta is planning to add themselves to the Fediverse. Set down this path and the someone deciding who gets access and how will end up being Zuck, or someone like him. That sound like a good future to you?
I hate that this meme always implies Trump handed that dude something smart when it was just absolute bullshit.