[EdStraker]

Really, really. I'm not trying to argue. This has been a very, very good discussion. Obviously, I know you know a lot of TGM. I've done my fair share of study and memorizing this site. I don't think my tone (or didn't intend) to warrent "dude" and guilt trips "I'm a piece of sheet".
It is definitely not "Tomasello only" for me. I'm very on board with what the professionals on this site say.
I'm not sold on the uncocking of the right forearm terminology. What I can say with certainty is that from the top, the hands know the line they must trace - through training - obviously the hands screw up at times, or the pivot is faulty (due to pivot control) and screw up the hands. At the least, the hands' intent or knowing the line they must trace causes the hip slide. I'd say focus your mind on hand plane line tracing and let the hips respond.

Why wouldn't you train the pivot? Train it, get it ready to respond to the hands ( maybe the term is "oil it up").

I believe the pivot needs to be trained first before you learn a hand-controlled swing. Tracing the plane line with the hands will not automatically cause the hips to slide. You can trace a plane line with the arms moving from the shoulders only and no pivot.

Tomasello covers the pivot in his first Australian video.