I listen to music most while on the bike, even in-ear earbuds just randomly fall out of my ears very often. I can't imagine finding one of these if they were to fall out of my ear during fall.
Lack of awareness? How about having a radio in the car or, worse, (hands free) calling? Or even having excited conversations with three others in the car, that surely gets your attentiveness down way more than music on a bike.
