I would agree, if the Autopilot didn't need a significant amount of human attention to avoid a simple, potentially deadly crash. Your equation should be rewritten to:
human paying attention to driving + human preventing Autopilot from crashing + Autopilot
I seriously doubt this divided attention produces a safer system with today's technology.
Except
human paying attention to driving + human preventing Autopilot from crashing + Autopilot
I seriously doubt this divided attention produces a safer system with today's technology. Except