Well, of course, it's not. But your parents expect more, and you should, too. College is a lot about books and grades. Grades are the scorecard by which you will be judged. And, like it or not, even the brightest high school students sometimes don't do as well in the college classroom as they or their parents expect.
College is harder.
Certainly, grades aren't all that matters, but it is an indication of your accomplishments. Your expectations for parental financial support during your college years can continue to be a source of conflict. If you're like most students, you probably expect your parents to give you financial assistance without intrusion. Chances are, they won't. Well, you need to understand that your parents are the ones who burped you, changed your diaper, and saw you through school from kindergarten to high school graduation.