Since the schools have high demand there is another student that will replace the loan recipient so the private school will not suffer one iota.
However the poor or middle class student just had their bootstraps cut off, the same ones that they'll be told they should've pulled themselves up by in 10-20 years when it's explained to them why they are not to have help with healthcare when they get cancer and have to stop working or why the banks are getting bailed out directly but their mortgage is definitely going to be foreclosed in the next housing crisis
However, we've made these loans non-dischargeable and people are basically on the hook to repay them no matter what and if they are going to pay them back they should have pretty broad freedom to use them at the school. If these were grants that didn't get paid back, I'd be a lot more sympathetic to the "well these have to be used at a state school and that's it, sorry, no free ride into the elite class today".
But these aren't bags full of cash that are not traceable, the students are going to pay these back come hell or high water, they should be able to use them where they want (within reason--we shouldn't be issuing loans to people to go to ITT Tech)