Mentorship is important for many reasons, but the main is that in the beginning nobody knows all of the rules of the game. Only by modeling the skills, qualities and leadership traits of the leader is someone able to reach the mentor in terms of skill and overall competence.
Once competency is attained by following your leader, then and only then should you start creating your own style. This is the path to mastery.
RE: Find your Master YODA - Mentors are important