Doug,
I think you need to realize that different people go into the wilderness for different reasons. For example, a birder might want an mp3 player with bird songs of different species; s/he may want to listen to a particular bird call to make a positive ID of a bird that was just heard. An ultra-endurance athlete may just be blowing through the wilderness for a hard workout, and may want to blast some tunes that help to get "amped". Some folks go to the wilderness to relax; others go there to work.
Personally, while I enjoy time in nature, I also spend a lot of my days of hard work on the job in nature, and... because I spend a lot of time outside... I'm not necessarily feeling the need to retreat from civilization nor trying to do that, when I'm outdoors.
Not everyone is there for the same reasons you are, and there's nothing necessarily illegitimate about other people's reasons.
By the way, keep in mind that those "pockets for mp3 players" are really pockets for mp3 players and/or cell phones and/or GPS devices and/or PLBs, and so on. For example, my phone is also a PDF file reader with all of my instruction manuals for my camera gear; plus it's an mp3 player, and a TV, and a radio, and a pseudo-GPS, and a tide calculator, and a depth of field calculator, and a sunrise/sunset-moonrise/moonset time and location calculator, and a video recorder, and a video player, and a still camera, and so on.