Of course if you're an ignorant right wing anti-intellectual climate change and evolution denying religious fanatic, the idea of everyone having a Harvard degree is existentially terrifying for other reasons that it losing a little bit of value.
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.