Yeah don't get me wrong, it's definitely a better thing to do with the money than some of the alternatives. It's just difficult to look at the system as a whole and go "Ok, so Xmillion kids in the US are going to go medical schoool this year, 99% are going to go into hundreds of thousands of dollars in debt, but these lucky 10,000 are going to get it for free".
Meanwhile, you look at that wealth and trace it through and think "Hang on, that's an incredible amount of wealth accumulated over decades. I wonder how much tax revenue that resulted in? $0.
Meanwhile, you look at that wealth and trace it through and think "Hang on, that's an incredible amount of wealth accumulated over decades. I wonder how much tax revenue that resulted in? $0.