I might be in minority here but I kinda see the point the Readium guy is making, specifically this one:
We managed to convince publishers (even big US publishers) to adopt a solution that is flexible for readers and appreciated by public libraries and booksellers
Publishers and companies will always want DRM so at the very least we (as a community) could offer a DRM that is less flawed, more respecting of privacy and FOSS, etc. If we dont, someone else will offer a DRM solution thats far worse (and publishers will implement it because they dont care and there are no consequences).