Man, I love reading Stallman talk about digital freedoms. Especially the point he makes about “intellectual property”, since I first heard him break down the term “intellectual property” I stopped using it entirely.
Why does Richard Stallman have anything to say about a non-GPL tool used to fetch files from proprietary services?
Why do you have an impression that rms keeps his public expressions of opinion limited to a narrow topic?
GPL is a tool serving his more general copyleft philosophy. There’s plenty of interesting material in the youtube-dl takedown story, from a copyleft perspective.