I have been reading (and watching) about this topic, but I still have no grasp of why it is important - and in what way.
I think it has something with the right forearm, the bent right wrist and the flat left wrist to do - but what? Is the important thing to have the right forearm and the clubshaft on line at address and the left forearm and the clubschaft on line at impact - but so what? Doesn't the right arm begin to straighten in the downswing - what happens to the flying wedge then - does it disapear or change shape and what are the consequences? Why is this flying wedge business so important? Is it the angles and/or the plane this is about?
BTW does this have anything to do with the L position between the clubshaft and the left arm in the backswing? I just don't get it. It's the wedges that is the problem - what to do with them in what fashion? The flying aspect is probably just the movement/motion of the swing?
Do leverage and lag have anything with this to do?
How would you explain this to a 10 year old and if that's too difficult make it a 7 year old.