I understand what you're saying here. I would reiterate "fair use".

I know, DMCA take downs can happen for a lot less than what's covered under fair use, especially with YouTube/Google's system of handling take down requests. Err on the side of the copyright holder, until proven otherwise.

I still have a lot to look into on this so I can't say how relevant your point or mine is in the context of GN. But you certainly do make good points.