Divide et impera.
You turn up your music to hide the noise. Other people turn up their music to hide yours. You turn up yours again. Everyone buys a bigger stereo system. This is the arms race of sound. You don't win with a lot of treble. This isn't about quality. It's about volume. This isn't about music. This is about winning. You stomp the competition with the bass line. You rattle windows. You drop the melody line and shout the lyrics. You put in foul language and come down hard on each cussword. You dominate. This is really about power.