This is not a good analogy. Being vaccinated is strictly better than not being vaccinated, even if you don’t get your boosters. It’s not settled yet whether a three-nines level of automation is strictly better than zero automation. It’s entirely possible that this level of automation is good enough to convince most users of its infallibility, but not good enough to reduce the statistical accident or fatality rate.

Perfectly safe 99.9% and highly dangerous the other 0.1% may be overall more hazardous than human-level safe 100% of the time. Or it may not. I’m not making a claim either way. But it’s not a crazy notion that it may not be.

More data is needed. I’m cool with that data being collected in the real world with real drivers. Gotta crack some eggs...