In order for each person to reach their maximum potential, they need a person who is an impartial observer and who's main focus is helping that individual realize their full potential. A coach educates.
Coaches can only work with someone who is already up to great things, but still wants more.
In the business world, all successful business people surround themselves with coaches. Frequently, they are referred to as consultants, investment advisors, public relations specialists and statisticians. The reason most of these individuals are so successful is because the coaches are behind them helping them breakthrough barriers that normally would have stopped them. You cannot succeed by yourself. It's hard to find a rich hermit.