The full rides you're referring to are often reserved to students from very low income backgrounds. Let's say your mom and your dad make 150 combined, that doesn't mean they have a spare $60,000 for you to go to school. Meaning you might have to take out some student loans.
I still think student loans are an amazing program, and no they don't need to be forgiven. As long as you take out loans the right way, for example in my case I went to the cheapest possible School, and I finished college at my own pace. It worked out very well for me. With student loans I was able to get away from my horrible family. When I see these stories of insanely irresponsible people who take out a quarter million in loans I the good student loans do is lost.
Regardless in this case the students only took on so much debt because they wanted that sweet sweet USC degree.
When you're 25 you can do a bunch of stupid things. That doesn't mean we need to pass a law to stop everyone from doing anything silly.