You have a grossly oversimplified understanding of human input during a flight. Once at altitude and cruising autopilot can be used, but a certain amount of hours actually flown as well as takeoff and landing are required, and AI isn’t near good enough to take-over during an emergency the way a human operator can react to the situation.

Also manual labor won’t be a thing for long, Boston Dynamics is making progress hand over fist when it comes to quadruped and biped robotics. The moment we train models to handle labor jobs they’ll be out the door as well.