Importing Educated immigrants is a huge benefit to US economy. It saves on student loans! Especially true in STEM fields because Americans are not anxious to study hard for advanced degrees in STEM. It is grueling curriculum. I know from personal experience having received master’s degree in engineering from Univ of Iowa.
It took me 7 years of hard study work to get my masters.
On the other hand, computer programming can be learned ina matter of months if not weeks, and it is no surprise computer programmers are available from so many countries on the cheap.
There are 3.5 million un- or underemployed STEM-educated US workers. H-1B is corporate welfare.