They have been talking about how creators want to own their platform and I could imagine that they don’t mind allowing a few such people to migrate off Threads to facilitate that. In the end what matters to them is that the large audience stays on their platform where they can serve them personalized advertisements.
This is nonsense. A small static website is not going to be hacked or DDOSd. You can run it off a cheap ARM single board computer on your desk, no problem at all.