Maybe the cost of improvement is failure in this case. For Tesla to fix the issue of a crossing tractor trailer not being positively detected there had to be an instance of a Tesla hitting a crossing tractor trailer. Maybe for road work barriers that change position as the road work progresses to be avoided there needs to be an impetus for Tesla engineers to build in detection of these cases.

This is all a way of saying that I reject the notion that autonomous vehicles are more unsafe as compared to manually driven vehicles. This isn't an impulsive reaction either; data compiled by the NHTSA has proven this out.