His logic and knowledge is flawed.I think PJ is pointing out that the logic is still flawed.
That can take place and work. The other is the club head PATH which a skilled golfer can control. The clubhead path and clubface can be coming into the ball from outside to in or inside to out. A skilled golfer controls that along with the clubface position.I think the difference may be mechanical. In pool you pretty much have the same stroke and just adjust the speed. You really don't ever want to pull or push your stroke closer to or away from your body. Not a golfer, but it seems clear that top level golf includes manipulating the club face. If this is true, focusing on only potentially opening or closing the club face would at least intuitively make sense to me.
Do you play golf? Have you ever?