So he and his passenger went to sleep fully knowing that Tesla's driving assist could fail at any moment?
You mean, they were both suicidal?
Much more plausible is that he is scared to implicate Tesla into this.
Source: https://www.nytimes.com/2011/05/26/business/global/26airindi...
Or maybe because the potential for disaster is too great, like the 737 max attempting to nosedive into the ocean because of a single sensor failure.
The only thing that makes me question is that only around 5 people have been killed by a Tesla on autopilot or FSD, which frankly is shocking to me given the multiple videos of abuse of these systems floating around the internet.