"I thought: If they keep turning up the volume to compensate, they will be an even greater nuisance to their children than they are to their parents."
I'm sure that is true, not only because of damage to the ears but also because of the increased stress levels caused by living in an environment where ALL CONVERSATION HAS TO BE CARRIED ON AT SHOUTING LEVEL.

But I also heard somewhere that the adrenalin levels associated with excitement or fear are necessary to growth. Loud music with a strong beat is probably one way to boost adrenalin, so such music is appropriate for young people but not so beneficial to older ones.