His point is that by modulating the throttle you can move the weight of the chassis around. Doing so affects how the vehicle steers. The statement is a bit exag

His point is that by modulating the throttle you can move the weight of the chassis around. Doing so affects how the vehicle steers. The statement is a bit exaggerated but nonetheless based on facts. It all depends on the car you are driving. Sometimes the brakes do more than the throttle during a turn.