[recursivecaveat]

Yeah, suppose a self-driving car is say twice as likely to crash as the average human (which could already be considered unfair since that includes like drunk humans and people who should've already lost their license). That means to monitor it's driving you will need to wait 25,000 hours until an accident occurs. That's ~ 12 straight years of a 9-5 spent sitting, doing absolutely nothing, just watching in a state of theoretical vigilance.