FlyingApe
Does the fact that there are autonomous aircraft currently flying that achieve vastly more tricky tasks than that required of an airliner not cause you to doubt your opinion even slightly?
No, they are not carrying passengers, but that is not a technical difficulty.
Out of interest, the aircraft you fly, what decade of last century was it designed in?
I only ask, because I used to have a car that the ABS never worked on. This was because it was designed before ABS was invented.
Perhaps something similar with your aircraft and autonomous flight?