While I am not downplaying the significance of mentorship in career and business growth, I also believe that people can be self taught to become self made.
Is it a must that people must have mentors to make it in business or career? Can't self learning build the knowledge and experience needed for one to strive in career and business?
I believe that when you have a mentor to guide you through your business, you minimize the incidents of failures and set yourself to succeed faster than without a mentor.
I believe that having a mentor helps to a large extent in navigating challenges in career or business. When you have highly successful business mentors, you leverage on their experience and even connections to succeed.