People just don’t get it.
Several of my friends are airline pilots who fly aircraft with multimillion dollar autopilots. At no time, is the autopilot engaged that someone isn’t watching the autopilot and ready to assume manual control if the autopilot has an issue. Typically, one pilot is monitoring the autopilot, the other pilot is monitoring the pilot watching the autopilot.
In my single pilot aircraft it’s the same thing. I monitor the autopilot like the plane is being flown by a student. I’m continually cross checking what the plane is doing. It frees up some of the workload, but I’m still the pilot in command. Several years ago I was level at altitude and enroute for about hour when the plane suddenly rolled into a steep right turn. I overrode the system returning to course without Air Traffic Control even seeing the deviation on RADAR.
My point is, the Tesla driver needs to pay attention and be able to assume control is a split second. If you sitting behind the steering wheel you are the pilot on command, don‘t be a passenger.