True, but that's largely because there are much better options than using a stick for aiming. In a normal FPS, you'd want to set the pad to act as a mouse and the gyro to do the same, as you said, to smooth things out. For twin sticks, you generally want the left pad in screen region mode, where the screen (or a circular section around the center) is mapped to your pad. In games that don't let you use mouse input, the pad can also be set as a mouse-like joystick, which works surprisingly well. All of that said, the left pad works perfectly well for movement.