Tesla themselves muddle the waters. On https://www.tesla.com/autopilot, it states "All Tesla vehicles produced in our factory, including Model 3, have the hardware needed for full self-driving capability at a safety level substantially greater than that of a human driver."
Further down, it talks about "Full Self-Driving Capability", "All you will need to do is get in and tell your car where to go.", "The system is designed to be able to conduct short and long distance trips with no action required by the person in the driver’s seat.", etc.
It's not shocking folks have gotten the impression it's a self-driving feature instead of a fancy cruise control.