Is grading on a curve desirable? Why not, if everyone is really good, everyone gets an A? If they all fail, they get F's. I had a friend who was a professional

Is grading on a curve desirable? Why not, if everyone is really good, everyone gets an A? If they all fail, they get F's. I had a friend who was a professional musician auditioning for orchestras. At that level, EVERY applicant to these positions had won every music award they were eligible for since they were a kid. He never paid a dime for his music degree because he had a full scholarship. Zero debt to worry about. Still the audition outcomes were basically random because everyone trying out was perfect. So what's wrong with that?