This is the concern I have with all the driving aids: adaptive cruise control, automatic braking, lane departure assist, et cetera. It all leads to drivers paying less attention to the road and more attention to their @#$%&*! phones because "Muh car drives itself."
Human drivers have been day dreaming for decades. It is not hard to move your car down the road without paying attention - until you run right through a red light or worse into a car.