Well, congress did write the law giving the admin power to do this, with little restrictions.
The Supreme court should only be making their ruling on whether the law written by congress and passed in to law, covers the Biden admin for their action.
Not whether congress should make this decision because it is a lot of money....that is NOT something the SC should even consider, because it is NOT THEIR JOB... Their job is to decide if the action of the Biden admin is legal and constitutional and whether through the laws on the books, congress gave that power to the administration.
That being said, I think it is a mistake to forgive x amount of the student debt, without taking measures and changing laws, that caused the problem in the first place so it doesn't just continue...
BUT that is not the SC's job, their job is to determine if Biden can do this, under the law, and constitution.