Do you remember when you were 10 or 11 years old and you really thought your folks were the best? They were completely omniscient and you took their word for everything. And then you got older and you went through this hideous age when suddenly they were the devil they were bullies and they didn't know anything.
Jazz stands for freedom. It's supposed to be the voice of freedom: Get out there and improvise and take chances and don't be a perfectionist - leave that to the classical musicians.