The intent is just convenience and speed of play. Even if allowed by the rules, I would never stroke a missable (6" or >) when it counted with either a bag on my shoulder or a wedge propped up against my groin.
Back, knee, elbow, and shoulder braces which may in fact cause the player not to overswing appear to be legal. How about a bailing hook harnessed from the head with the tip snuggled to the scrotum? I guess that intent is the key, and who is to question one's reasoning?