Fix the club face first, not swing symptoms
Golfers often chase swing symptoms like hanging back, an early release, or a lack of lag, when the speaker says those bigger arm and body movements are generally compensations made to square the club face at impact. If instead you get the club face a little more square on the way back or more neutral at the top, you remove the need for those compensations and the body can start working better. He suggests filming your swing and tuning in to what the club face is doing rather than chasing the symptoms.
Channel: Mark Immelman
Watch official source at 11:49Why this context matters
Framed as a diagnosis principle: treat the cause (club face) rather than the visible swing faults.