I think it is true that you cant depend on grades or tests to show your total intelligence. However, it does show your ability to be a good steward in turning in assignments, reaching out to professors when help is needed, and executing your duties as a student. And in the end, when going into a job or grad school interview, more than half of it is whether or not you are going to care enough to pursue and learn. So no, grades arent about intelligence, but more so if you have any to care about and foster.
Agreed.
(Source: did-you-kno)