First of all, he does get it right in the beginning when he talks about shifting weight, because that’s exactly how one applies force to the ground.
This of course refers to the insane rationalization the analysts are making trying to explain why certain swingers’ leading feet are flopping and flying all over the place through impact.
I’m not saying you can’t swing forward, but that is not mechanically-optimal and can actually lead to mechanical-correctness issues, which of course means you’re sacrificing performance and raising injury risk.
One of the main issues of trying to swing at the target with the golf swing is that the ball is located near the bottom of the swing arc… so trying to direct force and energy at the target with the club when the ball is nowhere near that point means wasted energy and inefficiency.
With only one arm, young Tommy uses the Primary Lever of the shoulders with the leading arm.