Are you saying that all these degrees are just a way for universities to milk out cash from rich international students and don't provide anything in return? I can see where you might get this judgement from, because there are master programs that will do this. But a lot of the top MFE programs put substantial resources into getting you hired, prepping you for interviews and updating their curriculum.
Look at the 2021 quantnet rankings, employment rate and starting salary. Baruch,
CMU and columbia have some deeper employment stats on their site. So what if it's a way to get visa? All that matters is your return on the degree. Personally, I would say only the top mfe programs are worth your money