"Car controls (knobs, sticks, paddles etc) can be operated by touch alone - there is no reason to take your eyes off the road. "
Good point. A touchscreen offers no tactile feedback, (unless haptic) so you have to take your eyes off the road and look where you're poking.
Being in the market for a replacement car, I have visited several forecourts recently. I have walked away in disgust at being offered an infotainment panel which is _wholly_ touchscreen-operated. That's Ford and Toyota off my shortlist, possibly Honda too. The VAG offerings (that I've seen so far) at least have knobs to twiddle.
How come it's illegal to fiddle with a 'phone while driving, but magically ok to faff about with a car's touchscreen?