Yeah. Do people really think that Silicon Valley would be such a huge economy (and a huge job creator for US citizens) if the US had never allowed immigrants to work there?
Founders of the original valley companies were US born (except Shockley) but by the early 70s many of the key participants were foreigners (Grove, Faggin, ...).
Yeah I would say very little about our current immigration situation resembles anything like 1970. So I’m not sure what the magic key to success is, that was alluded to other than “some people who were key were also not born in America”.