Aren't most of the Phd's in STEM in America foreign born? If America no longer had this "brute force", then those people will likely go to the new cultural/econ

Aren't most of the Phd's in STEM in America foreign born? If America no longer had this "brute force", then those people will likely go to the new cultural/economic capital of the world and a new country will rise which "innovates heavily"