Seriously, have you ever talked to anybody in the media player business? We *all* hate DRM - it's a pain in the neck to do well, there's absolutely no benefit to the end user (our customer), and you have to make ridiculous commitments to the content providers - about physical security of the keys, procedures for managing the inevitable discovery of workarounds, etc.
I worked on the iPod team, and later for a company using Windows Media DRM. You might remember that the original version of the iPod had no DRM at all - we just put a "don't steal music" sticker on it, and stored the songs in a "hidden" folder.
The record labels insisted on Apple imposing a DRM scheme for the iTunes store. They would have preferred that Apple license Windows Media, but as you might imagine, that idea really didn't fly for Apple.
Instead, Apple created Fairplay, which was enormously less restrictive and annoying to end-users, most of whom were never aware that it existed at all. At the time "unlimited play on up to 5 computers and an unlimited number of iPods" was an incredible step forward compared to the mess that was WM-DRM.
Without the success of Apple's much-less restrictive scheme, the record companies would never have considered allowing Amazon to sell DRM-free songs.