I really don't think the name matters from a safety perspective. Also, if you want to base it on the definition, you'll find that its a pretty reasonable analogy to an airplane autopilot. The pilot of an airplane can't just walk away while on autopilot. But I don't think the definition matters much, because I don't believe the name can cause significant safety issues, and also there is no evidence to suggest it is causing issues in practice.

Also, your other argument really depends on what "X" and "Y" are, and I think you'll find that they are not really claiming what you think they are claiming.