I can't find anything about waymov cars killing people. Not saying it didn't happen, but id like to see your sources on some (assuming more than one since it's plural) of the deaths.
Regardless, the technologies existence is what is being debated here. Not the moved goalposts of "operable in all weather" or "has never killed someone" using those same goalposts I could claim that passenger aircraft isn't here yet since you can't take off in bad weather & they have killed people