You are right, but unfortunately you are the least useful right, which is technical right.

That is definitely what auto pilot means in the aeronautical and maritime sphere.

But a lot of the general public has a murky understanding of how an auto pilot on a ship or a plane works. So for a lot, probably the majority of them. They will look at the meaning of those two words and land on that auto pilot, means automatic pilot. Which basically ends up beeing self driving.

Sure in a perfect world, they would look up what the term means in the sphere they do not know, and use it correctly, but that is not the world we live in. We do not get the general public, we want, but we have to live with the one we got.