It's a net loss for the US if a middle class Indian high school student comes to the US on a scholarship (American scholarship), graduates and is then sent back

It's a net loss for the US if a middle class Indian high school student comes to the US on a scholarship (American scholarship), graduates and is then sent back by the US immigration system (shortage of visas etc.). This story was was strange because I had a strong positive and negative feeling while reading it. Positive because I thought wow, India is really making it big with this coming generation of awesome students (I'm not Indian), and negative because I felt sorry for the kids. They seem to be under a lot of pressure and stress.