They’re not dangerous. There’s about 1 fatality for every 100 million miles driven, if I recall. That’s REALLY low and it is getting lower as safety features like automatic braking become ubiquitous.
Also, note that "per how many miles driven" is a deflection used by pro-car-dominance folks.
Part of the problem in the US is precisely that the transportation system compels people to drive so much, and looking at fatalities per distance traveled obscures that danger.
I didn't have time to check when I wrote this comment, but looking now, the US rate looks like it's usually more than double that of major developed peers, and in some cases more than 3x as high.
