Recently I heard a team leader of a communication team wanting to protect his first year staff from sitting under too many seasoned, veteran speakers so as not to feel a sense of insecurity. While I can appreciate the pastoral nature of this leadership, I disagree with it from a long-range perspective. If your young communicators or leaders are not exposed to experienced mentors, the bar will remain low. As the years roll by your product, will be reduced to a lower common denominator.
In other words, if young communicators cannot see someone to emulate and be challenged to advance, they will never reach their potential. There is a certain degree of insecurity in youth which shows us how much we need to grow.
In this lies the process of self-evaluation. Speakers must watch techniques of others to learn and grow. We all need to see ways in which we can improve.