Are these debts using people's ignorance about financial terms to make money? AKA Are they predatory? - If so then that's a bad thing.
You might not care - but I care about the well being for people I'm sharing a society with. I don't want people taken advantage of. I don't want education to have capital associated with it. I want people to be able to get education without "oh will i be able to pay off the loans for this education."
So you might think you did a good job working your ass off affording education. People like Sanders and I think that getting a quality education should be completely unrelated to "working your ass off."
I've also worked my ass off to afford my education. I still think it's a bad system and I don't care if my taxes are rerouted from killing people in foreign countries to helping my society get stronger and better.