[Bagger Lance]

In hitting, the right hand can be the "fulcrum", whereas the left be the "force" (and the club is the "weight")-class I Lever, in which the "fulcrum (the right hand)" needs to be pushed against (as well) in order for the "force (the left hand)" to be applied.

In either case, the left hand/side needs to "push" (while being pulled/draged by the pivot).

I can't even visualize this for hitting unless we are talking about a left handed golfer.

First - Only a form III lever is used in the golf stroke. Look at a form 1 lever (2-L) and tell me how this is done. Also take a look at 6-A-2 for further clarification.
Second - Only the right arm is in a position to push.
Finally - The left side contribution to muscle power is so minimal, it isn't even considered in the power package and even pivot power isn't necessary for hitting. There is no "left hand" force in hitting.

I know you are trying to enlighten us BTS, but like 6B mentioned: "There is a lot of seems as if in this thread".