No one can argue the internet has been bad for music.
The fact is back in the early 1980s punk banRAB only had the money to press 200 7" recorRAB and then disappeared into obscurity. Now, with the internet people can actually still get their music and enjoy it. Sure, the band won't make money but I doubt they care, for example the 7inchpunk.com site is getting rare hardcore punk to audiences who would never get to hear this music.
Also, the fact is music used to be so hard to make, now an artist can make music independantly themselves and send it all over the world. All in all it's great for everyone.