If that is your argument its not a very strong one. I have owned many decks that are 90% touch screen over the years and I have never been in an accident that has been my fault (I was t-boned a few weeks ago when I clearly had the right of way from a green light). I know its crazy!!! the thing is you take your eyes off the road all the time. You glance at a knob before reaching for it to adjust a number of settings, the same works once you know where all the buttons will appear. You glance you see it you tap it. done. If you are cycling though more options than that while driving, you are already doing it wrong.
It takes time to learn any new device. If you had lived in said area, you would have known what stations were where, and this wouldn't have been an issue at all. Being in a new area creates plenty of confusion that is "an accident waiting to happen". Now I have seen some stupidly complex touch screen in dash systems, and I have never used Teslas, so I cannot comment on how well designed it is, but I have used plenty of them that work great. I know roughly where I am trying to go and how to get there. I sit the same distance from the dash every time I drive, so I know the area I need to hit based on all of those things, just like how you remember where the knobs are. If I miss, or its not doing what I want, I glance over and see whats up. I mean, people take their eyes off the road all the time for GPS or talking to the passenger, etc. I remember Top Gear did a challenge where they wanted to see if they could preform tasks like sewing while driving, and found that its actually pretty easy to drive while preoccupied. Obviously that isn't science, but driving is like second nature to most people, and a half second glance at the radio shouldn't cause an accident. If conditions are that bad, you shouldn't be fucking with the radio no matter how its built, and you should be focusing on the road.