I want to become a musician. If I listen to existing music, my creativity will be limited by what I've learned. Does that mean that listening to music is a bad thing if you want to become a musician?
Music is a poor example: a field with unusually rigid cultural norms, where true originality is punished far more often than it is rewarded. So, taming one's creativity by exposure to current norms is exactly how you become a successful (permissibly mildly creative) musician.
