Strike zone

[TussAgee11]

"The Strike Zone is that area over home plate the upper limit of which is a horizontal line at the midpoint between the top of the shoulders and the top of the uniform pants, and the lower level is a line at the top of the knees. The Strike Zone shall be determined from the batter's stance as the batter is prepared to swing at a pitched ball."

My interpretation (as taught to me by a clinician {and we know they can be wrong}, is that this means that the vertical aspect is to be determined by the batter's normal batting stance.

Wouldn't this also mean that it is the batter, not the front of the plate, that determines the point at which a pitch is determined a strike and a ball, and nowhere else?

Again, this was my clinician's viewpoint that has been put on me. Don't bash me too bad. Just show me the light. Seems as though this viewpoint is wrong.

Its really nitpicking, but I want to be the best!