Earlier quoted context omitted.
> If the CEO of an open-source company said, "Software isn't our product, software is our marketing", would you feel the same way? Yes, absolutely, 100%! By all means care about image and marketing, but if your actual product isn't good (software, music, or anything else), then who cares?
What defines "good"? Marketability to the lowest common denominator?
For music... I'm far less qualified to say, but there's still a notion of (subjective) quality, which is only loosely correlated to marketing. I suppose we could say "good" music is that music which people enjoy, which still is driven by the actual music and not marketing.