Comment by yazzku
You're mistakenly throwing books and music into the same bag.
I often download books before buying them because I otherwise have no reasonable means to judge their content. This is not much different from flipping through the pages of a book in a library before buying it. The appeal of reading from an actual physical book is not something that any digital form can replace, so the book being available in digital form won't stop me from buying a copy. I also have no interest in Kindles and DRM.
Music, on the other hand, might be a different story except for select audiophiles who prefer vinyl.
So I don't think we can generalize to "product" like you do in your argument. Details and facts actually matter.