I can see your point Joe and I agree. But, I can tell you that when I shoot a pistol with checkering, my grip from shot to shot does not change. Very different with a smooth strap pistol. My grip has to be re-adjusted when shooting multiple shots. Maybe its me, maybe the lack of grip up front. A highly agressive check job is a no go for me but, something "light" (see the CCO's strap) checkered, scalloped, ect would be my choice.
Other arguements say with a smooth strap, if there is sweat or blood involved, is too slippery. (hence the full grip stippling you see on poly guns).
It comes down to training, again.
yourself to get the proper grip BEFORE the pistol comes out of the holster/concealment. Draw and dry fire exercises practiced routinely will have you unconciously grabbing the pistol correctly every time.
I'm no pro so, take this for a grain of salt.
PS: Looks like to me that when you(Joe) draw your gun, you "slide" your fingers/hand down the frame till you reach you preferred grip. I can see this being an issue with checkering. For instance: My fingers/front of hand does not make contact till after the web between my thumb and point finger has encountered the beavertail. Then the rest of the hand/fingers fall suit. Make sense? Not sure if I can explain it any better. Sometimes my thoughts and typing do not work well together. Lol....