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 t

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.