If you are licensed to carry a gun, you raise your empty hands and announce to the officer that you are a licensed CC owner and that you have a weapon on you.
On the other hand, if you are an idiot hip-hop gang banger, you figure you can quick draw, kill the cops and go off to your next drug deal.
If you have the gun in your hand under your shirt, how do you “raise your empty hands” without pulling it out or dropping a loaded revolver?!?