If you live in an environment with inclement weather and awkward roads, everybody can't just choose to not drive there, but wayno can.

It's a question of their dataset not being comparable, not their individual driving decisions being better on a day to day basis

Maybe, but I do drive on ice and snow all the time, I just slow down.

but if waimo is opting out of difficult days, leaving the human to pick up that part, it will severely bias the safety comparisons because then of course humans will have more crash per mile

then any 'same period comparison' are destined to just measure this first-pick bias. they are going to need to compare with the driver data from the period before waymo introduction (while accounting for other constraints, so excluding rides on freeway, etc)

I think a lot of people my drive because of bad weather specifically, e.g. it is raining.

Sure.

But honestly, you have to have enough money to be able to lose your job to do that. It isn't always possible for you to miss work. All it takes to have bad attendance is a strict policy and a child that needs numerous doctor appointments. Or low pay and no paid time off when you can't get to work.

It is easy to resist pressure when you are talking a fun night out, but not so easy when the outcome could be utilities shutting off, less food, and so on.