For further accuracy, about 12k of the listed killed in the vietnam war were due to accidents and other non combat causes. Once you take those out, the two numbers are right in the ballpark with each other.
Regardless, the point stands. Idiots, careless people, and people driving dangerously kill as many people as a major war. Every year.
What do we do? Work on seatbelts and air bags...presume we're going to suffer the damage and try to mitigate it. We dont teach and test better, we dont take problem drivers off the road, and we dont thoroughly enforce one of the worst and most persistent instances of loss of life.
I think we oughta replace the air bag with an explosive full of nails pointing at the driver. That'd certainly cut down on the nutty driving a little bit.