Well, it's possible for there to be a shortage of early-career specialists. Even now, with CS majors stuffed to the brim across the country, entry-level software engineering salaries keep rising and the big companies hire as fast as they can.
I see your point broadly, but I think it's possible for that to be true and to also take university-grad H1-B employees.
But still, you want that shortage to stay there for a while, because that provides the incentive to US universities to create more spots in CS programs for US teenagers. If you go straight to hiring foreigners you are leaving US kids behind.
I see your point broadly, but I think it's possible for that to be true and to also take university-grad H1-B employees.