I think the "if Amazon/Google/FB don't comply, someone else will take their place" argument is weaker when replacement requires a constellation of thousands of satellites.
> I don't think anyone has the ability to shoot down enough Starlink satellites to make a difference.
Not with rockets, but maybe with lasers? What damage can a single one do? Could a country deploy them at specific orbits to have enough coverage to destroy a sufficient amount?
We are very very far from that happening. Even with most satellites being in the same torus around earth, if every single one in orbit right now were to instantly shatter, each piece would have something like a 1000sqkm volume to roam in.
It's probably all moot as China would probably simply halt Tesla Sales, as they are not bound by the logics of legality.