Don't know why you're being downvoted, because that exact thing has happened to many of my former lab mates. Giving a green card to anyone with a graduate degree in STEM fields would be the most sensible thing to do if the US wanted to avoid the reverse brain drain of foreign graduates educated mostly on the US taxpayer's money.
The vast majority of those grads would be very happy to stay in the US.
Where does this claim about being educated mostly on the US taxpayer's money come from? A lot of my classmates in graduate school have said they are in graduate school since it will give them more chances at the lottery allowing them to work in the US. Others have said they just wanted the best education they could get.
But all of them are always complaining about how theres basically zero financial assistance for them and they are lucky that their parents can pay for them, since even getting a part time job or internship is a massive hassle that most companies won't even bother with due to their student visa situation.
For PhD students in computer science, they will almost all get funding from the federal government (indirectly through grants).
Masters students, maybe not.
You are incorrect about the internships, which don't require visas for F1 holders as they get a year of OPT. Now, they might save up their one year of OPT for post graduation, which is useful for the wait in getting an H1, though I guess there are also useful extensions that can even get around that (IANAL, so I don't know what the exact story is ATM).
That is not true and the reason is obvious - bamboo ceiling in American companies. Think about it - Chinese grads have far higher chance to be promoted to a senior position in companies like BAT and all of them pay you well.
Is the bamboo ceiling string enough and well known enough that it would drive a majority of Chinese graduates from US schools out of the country even if they received a green card? I don't find this assumption oblivious at all. It's easy to underestimate discrimination if you aren't the ones being discriminated. Do you happen to have any data on the actual discrimination and more importantly for this discussion the perceived one?
The vast majority of those grads would be very happy to stay in the US.