A car that can do a single drive is one thing. A drive that reaches a level where millions of people can do millions of drives with no issues, that's an entirely different problem. We've seen many many videos of "single drives" working well.
Demanding a probability of zero can make anything impossible. And you're not even asking for zero fatalities, you're asking for zero "issues", whatever those may be. That is a wildly unrealistic demand. Human drivers are not that reliable either, especially in bad whether conditions.