[cruano]

Because it is the reason the US is a tech hub in the first place ?

No immigration means no concentration of talent, which means companies would just move to a country that allows that (e.g. Ireland) and they'll take their high-paying jobs with them.

[brodouevencode]

This implies the immigration came before the technology, which is not what happened.

[TheCoelacanth]

I don't think you can plausibly claim that the US was a leader in technology until the 20th century, which is long after the US started having enormous amounts of immigration.

[TorontoTheGood]

Silicon Valley industry grew big before major tech immigrant inflows. Also, you're assuming that US people can't do the jobs of visa people.

[jfyi]

We're talking early boom? Like WW2 era? It was more industrial. If we are defining tech worker as a person that worked at a factory for technology, I am pretty sure there is a history of immigration there too.

I don't think we could cleanly say either way though, it would come down to nitpicking the definition of "tech worker". I have no real interest in that, and will grant you could look at it either way.