Well, the difference is that I can pick up a CD with 13 songs on it on Amazon for $2.68. The point isn't that music is free, or should be free, it's the comparison the ad makes - which is erroneous. It's like comparing my Corolla to a half-track and passing it off as a reasonable simile.
I am sure a short advert should go into every single possible method of purchasing music to sync to a digital media player. They better cover everything, including visiting cousin bobs garage sale to purchase an album from 1965, then going online to get the adapters needed to sample the product. Never mind that 8track rastafarian compilation you really might be looking for.