Or you may come from a poor family and not be able to afford a good college education without taking loans, even if you are smart and motivated.. and then you have to pay back the loans.

I was lucky enough to get a full scholarship. I've recently come to the decision that I should try to repay that money by donating to scholarship funds... if I had gotten loans I would have had to pay them back, after all. So even though I don't have to pay the scholarships back, I think I should.