They don't need to cover all edge cases. They just need to be better than an average human and otherwise fail safely.

The life threatening situations are rather simple and reactive. It's a car colliding with something at a high speed.

No deep planing or human level negotiations necessary. Well designed LiDAR cars will almost never be at fault of killing someone.

I was predicting [0] in Nov 2018 that a next self driving car fatality will occur with 50% chance before March 2020.

80% before March 2021. Well, self driving cars are safer than I expected back then.

And Tesla should get there too sooner or later.

Also, the govt approach is proving to be quite risk accepting.

Tesla already killed and injured many people when on autopilot.

[0] https://www.metaculus.com/questions/776/when-will-the-next-f...