On the other hand, while our brains did not evolve to control cars, our cars were designed to be controlled by our brains. A system designed from scratch for autonomous vehicles would look radically different.

And even then, accidents where all parties are following the rules, e.g. being sober, undistracted by something in the car, giving enough stopping distance to the vehicle you're following, going the appropriate speed for the visual and road conditions, &c aren't the norm. Most accidents happen because somebody was irresponsible, usually blatantly.

...with devices that we're emotionally and physically addicted to flashing and making noises that are designed to ignite a flurry of activity in our reptilian brains sending the message PAY ATTENTION TO ME IMMEDIATELY!