A minha opinião é meio parecida com a do Pinker, que o John Hawks separou no blog e foi a única parte que li até agora:
To Steven Pinker, though, none of this adds up to a convincing case for music's evolutionary purpose. Pinker is not shy about seeing the traces of evolution in modern man-in "How the Mind Works" he devoted a chapter to arguing that emotions were adaptations-but he stands by his "auditory cheesecake" description.
"They're completely bogus explanations, because they assume what they set out to prove: that hearing plinking sounds brings the group together, or that music relieves tension," he says. "But they don't explain why. They assume as big a mystery as they solve." Music may well be innate, he argues, but that could just as easily mean it evolved as a useless byproduct of language, which he sees as an actual adaptation.
Estão vendo só, até o Pinker é Gouldiano as vezes...