My question is whether you believe the term is so wildly obvious that questioning whether a tiny fraction of a percent of drivers misunderstand it is completely unreasonable. It doesn't rely on Tesla having misused the term at all and for the record, I don't think they are.

But, I don't think it's unreasonable that some of the 5% of US adults who have never been on a plane might not understand what autopilot is in aviation. I don't think it's likely that the 8.4% of US adults who score below the lowest measurable level of PIAAC literacy have a good understanding of the warning messages when you enable Tesla's L2 features, or are digging through the owner's manual to understand them. It seems unlikely that the 3% of adults with <70% IQs are reasoning out the limitations of the system from technical definitions. Hopefully the idea is obvious here. You only need one person out of thousands to make a massively dangerous system. I don't think it's an obviously ridiculous argument that one person out of thousands doesn't fully understand and consider the complicated limitations of such a system.