Acording to the video link, Dave from Mazda mentions that there are two ways to achieve traction control, one by the reduction of the engine speed and the other by the brakes applied to the spinning/slipping wheels, so that the power can be distributed to the non slipping wheels instead. When we do not do any thing and the wheels start spinning Mazda, first of all just reduces the engine speed to gain traction, but it does not help in some situation, for e.g. as when two diagnol wheels are spinning/slipping. In that situation if we, push the button marked traction controll off, it only cuts off the engine speed reduction part of the traction controll. The spinning wheel braking part of the traction controll is still active and it takes over to stop the wheel slippage and there by re distributes the power to the wheels on the ground which help to pull the car out. This is how I understand it but some one needs to try that in a CX5 from 2017-2018 to see if it works.