The idea that airplanes fly themselves is spectacularly overstated in the public consciousness. The reality is closer to multidimensional cruise control than the pilots are just there for decoration.
Yes but there are still trained human pilots monitoring the auto landing systems, ready to abort if anything goes wrong. It general autonomous systems are incapable of coping with unexpected failure modes.
Sorry, to be clear, planes are not level 5. But to also be clear, there are different levels of autonomy. I'm not trying to suggest they are level 5 though.