... if you include the number of hours people are in a car, and use the number of hours people are hiking, and then compare the death rates, I don't think the automobile death rate is orders of magnitude greater. I am sure it is higher than death by hiking, but deaths per hour of hiking, when you bring in the incidence of death by heart attacks, HAPE/HACE, hypothermia, etc, it does get up there.

I assume that climbing and mountaineering are more dangerous than driving.
I do not have numbers to prove this but this claim is consistent with my own experience.