I have large hands and have experienced this same feeling.

The only plausible logic I can come up with is that most things in life are a compromise. Concealed grips are cut short to reduce or eliminate printing in carry applications. The abbreviated grips are made for carry and not necessarily shooting comfort or accuracy.

The second thing not readily apparent that I've discovered about rubber grips is that they feel really good in my hand, full size ones. They feel even better the harder I grip them. This sets up a chain of events that I first noticed when my knuckles were turning white, my trigger finger yanking, and my shots pulling low and left....not good.
I like wood grips with a tapered Plain Clothes bevel on the butt end.
They are comfortable to shoot, manage recoil well and don't print against my clothing.