But as you just noted there is no conceptual difference between EME and the proprietary plugins that it replaced (Flash based and Silverlight based video players).
So how does replacing something with something else that is conceptually not different change that status of the web from open to not open?
Neither Flash or Silverlight were ever web standards. Flash was never accepted as a web standard. EME is a web standard.
EME is as bad as Flash or Silverlight from a conceptual perspective. EME has no place in web standards, no more than flash.
Again, it's you who brought up Flash and Co, I never brought it up.