The man on the Clapham omnibus [1] thinks aeroplane autopilot pretty much flies the plane, with the pilot just watching. That's what is relevant to Tesla's marketing material, and they are surely fully aware of this.

https://en.wikipedia.org/wiki/The_man_on_the_Clapham_omnibus

It's not telling the whole truth, because the average person doesn't fly planes and has no firm grasp on how extensive a plane's autopilot is, or what the difference in situations is. What they do see is the Tesla marketing videos that hype it up to be better than it actually is.

It's lying by omission.

On Tesla's part, it's lying by omission.

In the context of someone using airplane autopilot as a defense of Tesla, they're not omitting anything. So I don't think that's a full answer to my question.