Well, easy, you have two hands on the wheel, all of a sudden, you have to avoid something, not only do you have to paw all over the wheel, but the force from sliding is pulling you around.
IF you have one hand on the wheel, and same thing happens, you can steer with one hand, and grab ahold of your seat, something to steady you, so you don't slide all over the place inside your car.
It's a lot easier to move an arm, than your whole body, and thats what you are doing, at ten and two.
