Well there's a lot of safety features that require semiconductor components. Back up cameras, collision warning, lane assist, brake assist, tire pressure warning, etc. Humans are bad drivers.
The lane assist and brake assist - along with adaptive cruise control - are great systems that also increase safety, if used properly. The difference in fatigue alone that these systems contrubute to is (anecdotally from my experience) night and day.
I believe that the improved safety is worth the increasing complexity of maintenance.