I downvoted because it's the sort of flippant comment that comes up in every self-driving car discussion, and there's lots more compelling reasons that google might want to spin off waymo that a fear of bad PR when a car kills somebody. (mostly because that's how the Google X projects have always worked)

Of course a waymo car will kill somebody at some point. Everybody knows it's going to happen, and there's no way google/alphabet hasn't essentially priced in that risk. If they were afraid of killing people, they wouldn't have gotten into cars in the first place.