but it’s not realistic to expect someone to stay alert for an 8-hour shift where the task is as monotonous as watching a car drive itself.
It wasn’t an 8 hour shift and watching the car was the actual job, come on! The driver was the tester. They were testing a system which wasn’t yet ready to go untested. The accident is entirely the fault of the driver in that case.
And it’s not like their reflexes were slower because of boredom. No. They were not paying any attention at all. They were watching a video. That is gross negligence and not the fault of the car or of the manufacturer.