In the mainstream shooting games, the Reticle is fixed in the center of the screen and never moves.
In order to shoot a target, the player must move the muzzle of the gaming gun. But Moving the muzzle, inevitably deflects the Reticle on the screen. That doesn't match the experience of a gun. So the proposition itself is a contradiction, a paradox. If analyzed by modern control theory, this is an "uncontrollable system".