"DRM starts from the premise that all readers are slimeballs and thieves."
Such a dire pronouncement doesn't logically follow. DRM starts from the premise that there exist many slimeballs and thieves. Next, that we should thwart as many as we can with technology, even at the inconvenience of paying customers, presumably yielding greater profit than in the absence of DRM.
The first assumption's undeniably true; the second is open to much debate. But "all readers are scum" is a needlessly cynical attitude to read into it.