That doesn't seem like a mitigation to what the poster above you said, to me. It just means that if I don't like it, I don't lose my posts when I move. That's nice but it offers no guarantees in the face of a corporate actor harming the overall federation of a network.
You and others in this thread aren't grokking what this means in practice: it means that users are transparently redirected to your new home wherever you are. If a corporate juggernaut tries to harm the network, folks just pick up and move their identity. The protocol bakes in treating the provider like a dumb pipe. The protocol puts the power in the hands of the users and at any time they can just up and walk away, defeating the stickiness of the provider.
No, I definitely get that. Where your data is, or is not, has no relevance to a network member choosing to behave badly or harmfully against that network. Nor does it actually impact what they can do to the network itself. It simply provides you with durability concerning your identity.