Earlier quoted context omitted.
Surely things like Widevine show that that precedent has already been set? There are many online things that cannot be consumed by unblessed clients.
Surely the fact that a single blemish exists does not imply that we should just curl up in a hole and admit defeat. The fact that Widevine exists does little to damage the core of the above argument.
> If you are supposed to be able to access YouTube from Firefox or Chrome, then you are also supposed to be able to access it via youtube-dl
Were this an axiom, services like Netflix simply could not exist. We're defeated whether we admit it or not – browser DRM is not being yanked from browsers anytime soon. That's not even talking about its forebears, like Silverlight, Flash, Applets, etc.