That, and also ABS only prevents the wheels from locking (much) under braking. It doesn't help you if you enter a corner too fast, or hit a patch of ice, or st

That, and also ABS only prevents the wheels from locking (much) under braking. It doesn't help you if you enter a corner too fast, or hit a patch of ice, or stab the throttle too early on exit, etc. Traction control helps with the last of those scenarios, and modern stability control can start to help with others. But as you said, this system would theoretically be able to go straight to the most effective inputs in any given situation, since it doesn't have to deal with a human driver in the loop.