If lenders had any significant risk, then lenders would evaluate the value of a school/degree combination (value being determined by the likelihood that they could be paid back).

High-tier school with a degree that has great employment potential? Throw a loan at that kid, that is a good investment.

High-tier school with a degree that has great employment potential... but the program has a 99% dropout rate? Think twice about throwing a loan at that kid, if he is in that 99% then you will have a hard time getting your money.

Shit school with a vanity degree? Tell that kid to get lost. If he wants a vanity degree, he can pay for it himself.