For me the cant is more about weight distribution. With a three and a half inch barrel 1911, the weight of the grip with full magazine in a vertical weighs more than the slide and makes the gun feel top heavy almost like it will fall out of the holster backwards.
With the holster canted the weight is distributed vertically, and balances on my hip better.
Don't do anything Stupid. And don't let Stupid do anything to you.