Mistake? Turning off emergency braking because it happened too often then continuing to drive on public streets isn't a mistake. That calls for a custodial sentence.
Also "we've got a safety driver and a copilot monitoring and classifying systems feedback, the co-pilot isn't involved in anything safety-critical so we can just remove them and give both tasks to the safety driver (thereby requiring them to spend half the time looking at and interacting with the monitors on the center console rather than watching the road)"
Vast majority of cars on the road and majority of new cars sold in US has no emergency braking assist. Who should we sentence every time somebody dies because of lack of EBA?
The vast majority of cars are being driven by humans who we expect to carry out an emergency stop if necessary. Replacing the human with a computer driver which is intentionally incapable of any kind of emergency stop and trying to justify this by relying on a human supervisor who's required to take their eyes off the road for much of the trip to stop the car is basically murder.
(Besides, relying solely on an unassisted human driver - even an attentive one - is dangerous enough that the industry wants to make automatic emergency braking systems mandatory on all new cars as soon as it's practical.)
