[Drakul]

Peter Molynuex and RARE wanted Kinect to use a controller:

Originally Posted by Kotaku Microsoft's Kinect doesn't need a controller. That's the whole point of the thing! Still, a controller-free gaming experience is a hard idea to get your head around, which perhaps explains why Peter Molyneux and Rare asked Microsoft to include one. "We were absolutely adamant that we needed a button, something with haptic feedback, that would initiate an action" Rare's George Andreas told Edge magazine. "It took a long time - we threw some prototypes together and then we saw you didn't need one." "We were very vocal to Kudo [Tsunoda, Kinect lead] at the time, and Peter Molyneux was as well, that you needed something in your hand." In the end, though, Kinect ships without a controller, Andreas admitting that "You end up falling back on the [gamepad] control scheme. It's a crutch really."

Source.