Ah, the PC K+M argument. Didn’t see that coming.
Actually, controllers are generally very accurate (Microsoft d-pad inputs being a notable exception.) If I push the A button, the A button input is registered by the console. If I push left on the control stick, the game registers a left input.
Now, I haven’t played Move, or Wii MotionPlus, but I did play many hours of standard Wii before my console was killed. With a motion controller, you make a gesture for the game to register. For example, say, you move the controller down to attack. Some people will move their wrist down. Others will pivot at the shoulder. The game has to interpret that motion, and try to figure your intent. Once you swing a controller down, you have to bring it back up to your original position. In my experience, sometimes the system doesn’t interpret if I’m moving down and returning to neutral. Sometimes it reads a down followed by an up. Sometimes it won’t register the down, and only recognize the up motion. The more complicated the control setup, the greater the chance for error.
Compared to that controllers are extremely accurate. Sure, we dont get 1200 dpi feedback like a gaming mouse, but it works just fine.