No, they hire 3 drivers in "low cost" countries and the car controls respond to the majority vote, for built-in redundancy. If you buy the premium subscription it's 7 drivers instead.
They might also care about not killing people, but fair enough I guess.
Not as much as if they were actually in the car.
Having been in a taxi with a driver who bragged about staying up all night on stimulants, I disagree.
What about DRUI?
This is an interesting case - probably the only time your lawyer would RECOMMEND blowing! :)