Corporations are like countries now, there's a king, there are serfs, there's a court, basically everything but moats. They're feudal societies, and there are good ones and bad ones.
My number one goal was not getting 'A's' - and I proved it. I was a 'C' student. You have to be ready to learn. If you're not interesting in learning, it doesn't work. As I grew older and wanted to learn and desperately wanted inside information, learning was a lot easier.