delegation

We are told that to succeed in life, we need to have good grades in school and in college. But when we look at the case studies of successful people, we find that most of them had low GPAs and many did not even finish the college. What's up with that? To solve this riddle, we need to think what contributes to a success in life, is it a good grade, or is it a real knowledge that comes from your inner love of learning? Do you need to comply with your teacher's expectations and invest time into something that the system expects of you, or do you need to follow your own path and delegate non-important tasks to writing experts?