[Daryl]

I have a too strong academic and work background in science to take what you say here seriously.

Whoa. I'm not questioning your academic or work success. But try to see this from my point of view.

When the Left arm is parallel to the ground during the Downstroke, the Flat Left Wrist is laying against the Plane as does the Clubface. They are Aligned against the Plane.

After Impact, when the Left Arm is Parallel to the Ground, the Left Wrist is again, positioned against the Plane, and so is the Clubface.

The Alignment of the Clubface and Left Wrist, when the Left Wrist is Flat, creates the Left Arm Flying Wedge. If the Left Wrist Rotates, then the Clubface rotates. Simultaneously, keeping the Left Arm Wedge Intact. This is "Rhythm" (per TGM). And this can occur whether the Club is Uncocking or re-cocking. So, regardless of the very different clubhead and Hand Speed, they can rotate together, simultaneously, synchronized by the Flat Left Wrist.

Radial Alignment = Rhythm.

RHYTHM Example – crankshaft and connecting rods.
Mechanical –Holding all components of a rotating motion to the same R.P.M.
Golf – Holding both Lever Assemblies to the same basic R.P.M. throughout the Stroke while overtaking all other Components at a steady, even rate.