A lot of their researchers are immigrants and will just return to their country. New students will stop coming and stay in their home country. America is cooked.
No, attending a US university in a STEM subject is one of the only reliable ways to migrate to the country now that they've made it much harder to get H1b visas. The flow of immigrants seeking an American education will not stop any time soon.
That still involves H1B though? Student visas are non-immigrant, you still have to transition to an immigrant visa like H1B to actually stay past 1+2 years of STEM OPT
