Your account of human drivers is hilarious utopian. I've driving in horrible conditions, I've watched people driving too fast and later having their car wrapped around the divider barrier, I've watched people get stuck on a residential street and end up in the ditch, then begging for someone else to go pick up their Sally.
People are awful in these conditions and exercise incredibly poor risk decisions.
You are implying that the inability of self-driving cars to drive in adverse conditions is somehow a positive when actually it is a serious limitation.
Sure, a bit of rain doesn't help the safety stats, but you can't just put the whole city on hold when there's a downpour or some fog.
People are awful in these conditions and exercise incredibly poor risk decisions.