The question is whether you are rating superiority on the overall set of classifications, or the smaller set of problems. I suspect it's a much easier task to make an AI that's better at reducing accidents than the general public, than it is to do that and also be better given a specific set of error conditions, such as "in a direction with a glare, and with roadwork and changed road conditions, correctly notice that the dog running ahead off to the side with people chasing it might be a situation that could spill into the road..."
In this case though, I imagine they allocated far more resources towards positive correlations than exclusions, since they just want a way to get their name in front of you.