Because of its location, gripping the club at the butt end and above the right hand, the left hand has to control a majority of the club's weight. If you don't have control of the butt end of the club, you don't have control of the clubhead. The club should run diagonally across the fingers under the left pad. See Illustrations below. During the golf swing, a tremendous amount of centrifugal force is generated due to speed and the club's weight.
Centrifugal force is an outward motion away from the center.
Gravity and torque are other forces golfers are faced with in a full swing. Gravity will pull or throw a club down to the ground. This will cause a golfer to strike the ground before striking the ball. Torque is the twisting of the clubhead. The way a golf club is designed, the clubface protruding away from the shaft, the clubface will twist or torque to the right on contact with the ball.