Might be a neurological process. First phase involves low resolution control of direction and intensity. Second phase allows for tweaking. (Third phase being abstraction, where you can reflect on how to blend different ideas and movements to create a whole new pattern)

That makes a ton of sense to me. It's like telling a baby who's learning to walk that they need to pay attention to how they're putting weight on the ball of their foot vs their heel, as it will give them better speed or something.