I respect RMS' position on software, even if I don't fully agree with it. As I understand it, he says that a software developer should be able to make money by selling services, e.g. maintaining/customizing software, and there are people out there who do just that.
But I think the argument falls down for music. Sure, following the 'services' argument, performers can make a living (in theory) by performing the music. But not all song-writers are also performers. So in this case, how would RMS propose that a songwriter get reimbursed? What about the people involved in the production of music, e.g. sound engineers.
I think the "music is like software and should be just as free" analogy does no't work.
(This is not to support the RIAA's unacceptable use of the the courts to prosecute the token file-sharing user with outrageous and probably unconstitutional damage judgements.)