I think @GJM is correct. The grip angle is a plus. (The 'Glocks point high' idea goes away after enough practice, and then you can say '1911s point low.)
Matt Burkett does a demo with you holding a rod or 2x2 a couple of feet long. With you holding the rod in your hand with it perpendicular to your forearm, he can grab on end and easily manipulate it. Then you add a cant to your wrist, and it immediately becomes harder for Matt to manipulate the rod. It's biomechanics.
The point of the demo is to show why you should cant your support hand (fingers pointed down roughly 45° when fingers are extended, rather than to the horizon.) But it stands to reason that if canting is good for the support hand it's also good for the strong hand.