> Maybe so, but also then everyone has a Harvard degree, which is MUCH MUCH better for society than a Harvard degree losing value is bad.

Is it your opinion that Harvard could provide the same quality of education to an unlimited number of students?

This isn't a right/left scenario, its logistics and market dynamics. Expanding access to a scarce resource means value of that resource goes down. A supply glut doesn't mean the product is any less useful, just that there's more for it so people will get to pay less for it.