Earlier quoted context omitted.
That would be an excellent way to force Google to switch distribution of all content via YouTube to HTML5 EME with Widevine DRM, given it's pretty clear their music agreements prohibit permitting this.
Most of YouTube content isn't music though. Why are they so user hostile - e.g. why can't I listen to talks/podcasters in the background while browsing the internet?
I think a better question is why would a talk/podcaster be using YouTube for distribution?