Instead of insulting him why not tell him why you believe he's wrong?
Fran,
As you well know, that is just not how some individuals operate. Instead of supporting what they say with a logical rational explanation that makes sense, they almost immediately resort to the 'attack the messenger tactic'.
I think you know that...
finishing by hitting the hand to the same point on the chest can create a physical 'muscle memory'.
We play a game of millimeters. If the set up is not perfectly in tune, alignment wise, with the shot, then that 'muscle memory' of that finish position can cause the cue to be "swung" off line for the shot at hand.
If the upper body is leaning over on an angle across the line of the shot, then the angle of that bend then effects the height of the landing spot or finish spot & THAT height difference then effects the cue line relative to the actual line of the shot, IF the hand is brought up to that same spot.
(I do not understand why one would ever want to bring the hand up unless they want the tip to go down instead of straight to & through the ball.)
So... a consistent landing or finish spot, while consistent onto it self is NOT consistent to anything else unless the set up is prefect for the line of the shot.
Trying to fix body parts at appropriate points in 3D space is extremely difficult to do & virtually impossible relative to other components & especially with any consistency that is proper for a physical endeavor that requires accuracy within millimeters.
This was not directed to you Fran but instead is just some general statements as food for thought.
Best 2 Ya,
Rick