If you don't let non-americans into the us, they cant be employers of americans.

Yes because I'm sure this attorney's work revolves around hiering CEOs and management positions. Point being that a tiny fraction of the people being brought here are not going to be employers and buissness owners. Most people are just taking jobs from Americans.

Half the country doesn't believe in science and that's where most of the work is. That's why you need high-skilled immigrants. But companies like TCS and Infosys do take away jobs from Americans.