I don't see how one could possibly come to that conclusion, except by rejecting out of hand the idea that there could be a true threat requiring genuine caution.
None, but the executive branch doesn't have any power to summarily prohibit American citizens from using dangerous things. If the danger checks out and can't be mitigated then Congress will have to pass a law.
What true threat could possibly exist where the models are perfectly fine to use, just only by American citizens?