I wonder if the most likely answer is simply that music is a really, really great thing and as soon as a person is in the position to search out music on his/her own and listen to it alone, the person will do it...and love it.
Music offers quite large number of benefits - all the benefits of art: expression of complex emotions, an opporunity for the viewer/listener to deepen his own sense of self, of the beauty of the world, and so much more. Music moves us, often literally. Music inspires us. It's no surprise that people who suddenly discover the ability to listen to copious amounts of music will do it.