What Cowpoke is pointing out to you is that the coach that you claim to follow is himself following how MLB hitter’s swing, yet what you are teaching isn’t how MLB hitters swing.
Musgraves follows MLB hitters ..... JDBerry follows Musgraves ..... MLB hitters don’t do what JDBerry teaches.
Just seems like there is a bit of a disconnect somewhere.
No, what I am pointing out to you is that Musgraves studied MLB hitters and realized that MLB hitters were not all the same but there were a few things that were consistent among them. Hand path was not one of them. Some are rotational hitters. Some actually have a hand path straight to contact, etc. Now, of course, if you think all of the MLB hitters swing the same, then there's not much more worth discussing with you.
He, to my knowledge, does not instruct someone out of their natural swing just for the sake of fitting a mechanical cookie cutter. But I do know that he doesn't get his panties bunched over semantics and isn't worried about the words as much as the results. Give it a try.