Because said corporations can move the same high paying jobs to Canada or India. Especially easier in these days where big companies are becoming more comfortable with people working from home and fully remote work. So instead of taxes and consumption happening in the USA, all that money will go offshore. Citizens' jobs will be affected too when new teams are set up offshore with people already up to speed on internal knowledge of IT systems.

When they are already set up offshore and they look for new hires, do you think they will hire first in SV/NYC or in their Canada/India offices? Same with layoff preferences, they would prefer to lay off people in the more expensive location. And maybe hire someone new in the cheaper location.

This will affect a lot of non-tech local jobs both at the company like HR and cafeteria, and jobs in the local economy.

>Not to mention Apple has a 99% approval rate for h1b apps

Then why do you think Tim Cook personally signed this letter?

https://s3.amazonaws.com/brt.org/archive/letters/Immigration...

It isn't just about approval rates, it's about being able attract the best foreign talent, people being stuck in green card queue for a decade+ with no end in sight, not getting visas in consulates etc.