Simple.
The user of the tesla autopilot is a car driver that is 'qualified' to drive a car. Driving licence doesnt entail knowledge of how to use tesla's 'autopilot'
You are literately equating a car driver to an air-plane pilot!
A pilot that need to be specifically train for a given model of a plane, and its autopilot. A pilot that is fully aware of the scope of the planes autopilot functionality, also pilot cannot 'go for a nap' when autopilot is engaged.