Real race cars tune with different degrees of camber at each corner. This can be an important tuning aid when you are using foam tires on asphalt to get your tire wear where you want it or if the track has banked corners and/or an unbalance number of left or right corners in relation to the other. This can cause excessive tire wear on the inside or outside of them.
Ultimately, the difference to get optimum tire patch should not be very different from corner to corner so this is why we run the same camber at all corners.