The problem there being when something unexpected happens that the automation can't cope with, your skills have atrophied.

I'm not a pilot but I am a technical diver, and we eschew many of the conveniences that recreational divers use, such as relying on dive computers. We work out dive plans on paper, and backup plans, and carry them with us on a slate. The only instruments we rely on are watch, depth gauge and compass, and these are of the simplest possible design, and we have backups for them. If something happens on a deep dive or a cave dive, you know exactly what the state of your system is and can reason about it. Not so if you were used to something else tracking it for you, and you had to start discovering it from scratch.