It’s to get a feel for the sensation of hitting the ball on the center of the club face and for hitting the ball straight. Golf is, my opinion, about hitting the center of the club face. A ball struck in the center of the face with a squared to the target club face is, again my opinion, the most important aspect of golf. It provides a feel like nothing else in golf. Swinging hard and striking the ball off the toe or heel of the club when you’re new to the game results in bad feeling shots that erode your confidence. Hitting fifty half-swing shots and nothing else at the range lets you get back in the car and sleep on a satisfying session. Remember, in order to play well, you must be confident. In order to be confident, you must play well 😎. Good luck.