This is inaccurate. The U.S. had a highly restrictionist immigration system from 1921-1965. The foreign born population dropped from almost 15% to under 5% by 1970.
During that time, the U.S. had a small number of highly skilled immigrants, such as German scientists fleeing the Nazi regime. You’re talking about a very small number of truly exceptional people. A $100k/year fee is not going to shut down this kind of immigration.
Source: DHS Yearbook, https://ohss.dhs.gov/topics/immigration/yearbook/2019/table1...
We have been around 1 million per year for decades. If we still had that policy, adjusted for population you’re talking about cutting legal immigration by one-third to one-half.
And that’s not counting a large increase in “gray market” legal immigration (TPS, asylum, etc.)
During last century, USA has been the most benefited from that kind of immigration.
Personally I think that this is a very short sighted decision by USA administration. But overall, I think that this will benefit the rest of the world. Maybe in a few years even USA will start exporting their best minds abroad!