There is much confusion regarding rotating your body versus swinging your arms & hands. Some people think they have more power when they keep their arms and hands moving independently of their body. This is false and physics proves it, just look at the figure skater with her arms stretched out. The skater will always move slower when the arms and feet generate the motion. When the skater pulls her arms inward while rotating her entire body, tremendous speed occurs.
In the golf swing, keep your arms, hands and club going with the rotation of the body. This creates speed and less manipulation with your arms & hands.