While your stats are valid, they thing you’re not addressing is the fact that semi truck accidents cause significant more damage then cars due to their shear size. Statistically, there are more car accidents because there are more cars.
But I do agree truckers as a whole are better/safer drivers…unfortunately not all of them are.
There is no doubt the driving factor for autonomous semi’s cost, but also lack of drivers. There’s a huge shortage of truckers in the US right now.
Why the push for semi’s vs cars…believe it or not - it’s easier. Especially long haul trucking. The start of autonomous trucks will be interstates ONLY. When/If that goes well they’ll slowly start moving out to, other areas. Even after full implementation - they may realize that autonomous trucks may not be allowed in certain places. As I’ve stated many times…it’s still in it’s infancy, and changing daily.