Having the moral high ground matters less than having a big warchest of money to spend on lawyers.

Does it matter if they companies doing are not in the jurisdiction or even if they are, maybe the can't prove it?

They can't prove it but can force you to spend time and money to disprove it.

The only thing they're going to try to do is ban Chinese models, and that's not going to fly outside the US, so Americans are going be the only losers.

Don't see the problem here actually.