You can probably manage to have 10x less chance of a serious accident than the average human by being sober, calm, attentive and caring about braking distances

You can probably manage to have 10x less chance of a serious accident than the average human by being sober, calm, attentive and caring about braking distances anyway. "Approximately as well as a human", measured by a pool of human accidents dominated by serious driver failings is a pretty low bar.