Gobbledygook that will be even more obbledygook than this claim is in the work visa program.
Take away availability of foreign hordes and even the worst leftist fag companies and academic programs will suddenly launch programs to encourage and assist Americans to enter fields "they don't want to do." All of the shortages (mostly contrived, exaggerated, or self-fulfilled prophesies) will vanish in a couple years. It might be painful for those couple years in the interim, but it beats increasing, increasing and increasing reliance on foreign swarmers, and Americans basically being imbecile subject people in the eyes of majority foreign born doctors, engineers, and soon lawyers, making Americans are basically colonized in their own land.
You have a point. If you want to harm Big Tech, kneecap their access to guest workers & force them to hire citizens.