[BerntR]

Is anyone listening to this or is it just you and me?

I'm listening.

Am curious to see where this goes.

Plane bending must imply some form of steering. Not in the usual golf sense perhaps. But still. Linear forces that partly drive the club away from the ball. Then linear that partly works in another direction than the object they are applied on. Forces to correct the offset created earlier in the stroke. Some work will be done that is counterproctive in a strict geometrical sense in the early part of the downstroke. And some of the linear forces will be "wasted" on bending the plane, which isn't really work in a Newtonian sense and which will not energize the clubhead either.

But maybe there is some good physiological justification for it still.