I you are a low single digit hcp player, you obviously have a LOT of unconsciously good stuff going on.
If you DON'T DIP, you will whiff the ball! Simple. You do it because in order to make solid contact from that setup, you HAVE to.
So you simply are not aware of the pullaway of your torso that occurs in a good swing with correct mechanics. Note this: your left shoulder is further from the ground at impact than it was at setup, and probably also than it was at, if you use, a forward press.
It is the reason SO MANY pros address the ball at the heel of the driver (ball on a tee, driver on ground, heel at SS), or the extreme, of Fuzzy Zoeller putting the club even MORE distant from the toes than that. Luke Donald is a currently visible practitioner as is John Daly and a host of others who do this. TW himself dipped down at least 6" during HIS swing, as does Tom Lehman. Again; if they didn't they'd whiff it.
I personally prefer an adjustment at setup rather than a dip during the swing to manage solid impact. So what you "blame" - dipping - is because you see it as a fault instead as a necessary accommodation.
Try setting up with a lower upper body or with heel-at-the-ball and locate perfect impact by trial and error to find out just HOW low you need to stand, or how much closer to the ball you need to stand, at SETUP.
Report back.