That's a good practice IMO... but when you have quite a few of best hitters in the world saying/practicing the same thing, that data becomes more convincing. Should you follow them blindly, no, (next comment not directed at you), but maybe need to be more open minded/understanding instead of trying to poke holes
When what you hear them saying doesn't match up with what you see them doing, how do you resolve it? Do you teach a hitter to move in a way that matches their words, but doesn't match their actions? That doesn't make much sense to me.
"Maddie, I want you to swing down to the ball." (ARod said so!)
Maddie chops down through contact.
"No. Your barrel needs to turn deep and come up to contact...but still swing down at the ball."
Good luck with that.