That you'd need a closed source browser or plugin to access the draconian DRM content that insists on protecting the render path wouldn't mean anyone would have to consume said DRM content, or use such a browser for anything else. As you said, they could as well "put out an app", they already do; and adding a "content protection provider", a black box ultimately, to a browser just turns that browser into that app. But, and that's kind of my point, it doesn't affect my browser in any way I can discern, at worst it would mean somtimes seeing "sorry, your browser (or lack of plugins/dongle/whatever) does not support playback of this content", as opposed to that page not being there in the first place.
