I think it's harmless and unnecessary to attack. It doesn't effect the game in the least asides allowing people to have songs they like played by their bard. Even decent for roleplay if you think of it. It doesn't sell gold or make the game easier or harder and in fact it doesn't really do anything to the game. Maybe you don't like what someone plays but then that's on you and they could play the same song possible without the support. Reality is though a lot of people won't know how to properly play an instrument on the game so instead of nails scratching on chalkboard it doesn't bother me they have the bard music player in limsa instead of a poorly played violin.