Much content that people are prepared to pay for has not, in practice, been ripped yet.

Evidence, numbers? (This is my second request for evidence and numbers.) There's a long tail of books available for Kindle that have approximately no readers.

People buy stuff because they think they should and it's easy to, not because of DRM. (This was the surprise for the record industry that the iTunes model actually worked - they had previously been creating terrible music stores that didn't work just for the purpose of creating evidence that filesharing was costing them actual money.)