Now it's about statistics but your comment was a personal, unconvincing anecdote by your own admission.

> You seem to be arguing from the idea that roads are filled with "killing machines" while mountains are "peaceful".

If you're a pedestrian or cyclist or passenger, you're relying on everyone elses ability to drive safely and not veer into you. If all it takes is a split second decision to do something different and simply turn into you, that's a killing machine as much as it is a transportation device. You can't do that on a bus or train without a gun, and it would be far from easy to do that on the mountains.