Taken outta context it won’t(wrong pitch local with gifs). But ‘showing’ said player to not dip there chest over the plate ‘too’ much will on an low and away pitch. Comprend eveything first, before you comment to not muddy said waters.
I comprehended what you wrote. Staying tall wouldn't get you down to the low pitch. No matter how the drill was done.So if you need a posture fix ... how about ‘ stay tall ‘.’ Don’t dive in’.