Why so many clubs?

A golf set is designed in such a way that each club is intended to hit a golf ball to a certain distance at a certain height. The game is simple if the golfer uses exactly the same swing with exactly the same power every time. The shaft length decides the distance the ball travels; while the face angle decides the height of the ball trajectory. In other words a golfer allows the club to decide the distance and trajectory. The longer the club the further the ball goes. The bigger the face angle the higher the trajectory of the ball. All that is required for the golfer to do is to hit the ball consistently with exactly the same power every time.