Most grad students do not pay full tuition, period. Many US students, and I would imagine those who get accepted to MIT most likely, qualify for NSF grants which cover the cost of graduate education. So your argument that MIT is acting as a "business to maximize its profit" is not very convincing.
I agree with you that some of the positions might be a bit extreme: the US is most certainly capable of producing highly qualified researchers, entrepreneurs etc.
Edit: One more point I would want to add is that currently, US universities, and the US itself, is seen as a very desirable place to live and do research. This might change if the country institutes a policy of (implicit) religious discrimination.
I agree with you that some of the positions might be a bit extreme: the US is most certainly capable of producing highly qualified researchers, entrepreneurs etc.
Edit: One more point I would want to add is that currently, US universities, and the US itself, is seen as a very desirable place to live and do research. This might change if the country institutes a policy of (implicit) religious discrimination.