Lack of optics - if it doesn't hurt me now, it must be okay! Most people who don't understand or dismiss the issues haven't been burned yet by DRM.
I've been burned by GFWL - Denuvo is not in the same league at GFWL, and has yet to impact me in any meaningful manner. I don't love the idea of overly restrictive DRM but the reaction in this thread is hyperbolic to say the least.