If I understand you correctly, the journey matters less and less (from adventure to sleeping pill), so it's not important where you are?
Not exactly. The sense of empowerment has been so completely diminished that any totem that gives you a feeling of control rises in importance. A diagram tells you what to do - a map tells you where you are. If you are feeling active, a diagram is great. If you are feeling lost, you need a map.
Modern air travel is all about making you feel lost. Even that barely-moving-map display counts for a lot. That's why they give it to you.