Everybody for their own reasons but. The most music I downld are live material that is unavailable commercially. I already have 'all' of that band's albums. I can't get enough.

Music is not the only thing shared on the net. There's art in all its digital forms. Poetry, etc.

As far as music goes, as far back as recording devices were available bootleg recordings & copies were being made. And that goes long before audio cassette tapes. Just a few thoughts.