DRM is fundamentally proprietary. Just because the container around it is defined in a standard does not in any way discourage the creation of proprietary systems -- it by definition facilitates them (and therefore appeases corporations that produce DRM content).

The whole "DRM will happen one way or another, EME is better" is only an acceptable argument if you don't have an issue with DRM (because then you can argue that EME is "nicer" than non-EME because EME is a "standard form" of DRM).

Making it frustrating for people to access DRM content results in a distrust of DRM vendors and a general dislike of DRM -- which is (in my view) a positive outcome. Facilitating DRM in a way that makes it much easier for people to view it is not a neutral position in a world where "DRM is inevitable".