Im done trying to explain the differeence between weight and Lag. Swing the clubhead, SEC
And if you watch that video- you will not believe what you see. Your Hands are not as educated as you think if they need to micro manage a pivot. A correct take-away requires a turn. A down stroke requires a turn. And the Hands do NOT move themsleves at the very start- if they do they are way to active and might nopt find On PLANE by themselves. If they don't move themselves- what does?
Take starting at impact fix. Cetainly the hands don't move themselves at the start. (they are frozen) Elbow, forearms guided by the brain to the nerves in the hands - hands knowing all along that the plane line must be traced. Body then responds.
There is no "muscle memory" in the hips that enables them to correctly turn in a precise fashion (or in shoulders, or in any part of any human).
That's just it with the hands controlled pivot. Do you move with brain attention to the hands or the hips or the shoulders? You can hit the ball by doing both. What method will be more precise? There is a reason why you do most everything in life through your hands.