The reason AJs' system works is that how the club works is not negotiable. When you learn from the perspective of the golf club your task never changes. It will be the same tomorrow as it is today.
Swing theory is exactly that... a theory. The only true law in golf is the club. It does not care who is on the other end. It can only work one way like any other tool. It has mechanical advantages designed in to it that must be obeyed. If you want the most efficient ball flight you have to use it in a particular way. Period.