Comparing a pilot to a regular car driver is just completely off point. You are basically throwing out all the training pilots have to do just to make your point.
Also if you fly like a maniac you’ll get your license taken away, which is very much not the case for driving.
Pilot use technical terms that they learn in both training but also in the culture around pilots. Words used by pilots in that context can have a different meaning than the literal interpretation of those word outside that context by non-pilots. The jargon is different, and thus advertisement towards pilots using that jargon will be interpreted in that context. The word "autopilot" directed towards pilots will be interpreted in that context, meaning they will expect the technology to work as training and culture has made them to expect.
Driver training is very different from pilot training, and the jargon and lingo is different from pilots. An car with autopilot that is limited to work with the restrictions of a airplane autopilot, ie only work at airport or while high in the air, would likely not be what the driver expected. The same word but different context.
What I think is more important is understanding what the general population of buyers of these cars think it means. Whether they are wrong or right, what they think it means effects how they drive with autopilot on, and whether they are looking ahead or on their phone.
The only real way to know this would be to measure it, and I doubt that is knowledge that Tesla wants to know.
As a side note, the Boeing pilot will spend a great deal of time looking at charts or their company laptop once they are at cruise with their auto-pilot on.
The FSD name makes more sense for the software they've got in public beta than their current offering. Interestingly the only difference between "enhanced autopilot" and FSD right now is the ability to stop at stop lights.