If 10% of the time they got into accidents humans would have avoided we wouldn't be where we are today. I can't imagine any scenarios where these cars get in accidents that a human would have certainly avoided. You also say avoided accidents don't make the news but I'm pretty sure footage of them avoiding accidents that humans would have no chance of will be a major part of their marketing.
>I can't imagine any scenarios where these cars get in accidents that a human would have certainly avoided.
Then you've not been following the space. The one that immediately comes into mind is the Tesla that slammed into the side of the semi truck because it was painted blue like the sky.
I follow AV news very closely. I'm talking about Waymo. The small set of accidents they've been accidents in have been limited to fault of other drivers with the vast majority being rear endings