The parent comment said that america always made up for its poor educational system by accepting immigrants, and then used SV as an example. But having educated immigrants is a relatively recent phenomenon. Nearly all immigrants before H1B were refugees or poor and poorly educated.

You’d be surprised how relatively recently most of the skilled immigrant groups have been in the US. In 1990 there were 781,000 Indian Americans. Today there are 2,800,000. The non-Hispanic white population grew 8% over that time (and birth rates aren’t any higher among Indian Americans). The other 1.95 million or so are immigrants and their kids who came here after 1990.