?In an effort to prevent the club fromtwisting when we strike the toe or heel, manufacturers have developed hig MOI clubheads. That's been good for you accuracy from the tee.
?When an ice skater spins with their arms out, they have a high MOI. But when they pull their hands close to the body, their MOI drops and they spin so much quicker.
In the golf swing, the club is actually rotating around your grip and your body.
The easier it is to control the clubhead and release the clubhead, the easier it is to generate extra clubhead speed. A lower swing MOI makes that possible.