It's all in the aids, man. It's all in the aids.
Project CARS accomodates for different levels of driver skill, which means little Johnny can win but only with a little help from the computer. So a bit of cheating if you will.
The big boys can of course turn everything off or set it to "Real" which would just give you whatever the car has on ABS, Stability and Traction control systems... if any.
If one thing Project CARS isn't lacking in than it's the amount of options you have to tailor your game experience to your liking.