You know what the last words of the Microsoft flight sim/ gamer types are in an airplane?
"Wait! I've still got 3 lives!!!"
That sums it up well. No job is all that hard, but unlike most ground bound jobs, there are times when we don't get "do overs". Big diference sitting in a cubicle vs sitting in an office going hundreds of miles per hour.
Flying an airliner is pretty easy MOST of the time, "most" being the key word. We all have had moments when we passed a test that someone sitting in a cubicle never has to face.