I don't think the WG is the creator (at least, not how most people think of it)
or the final authority. Jim however is both of those things and I think he's pretty much spelled out his views (see: the WoJ's I posted in the link). The WG and his forces may not know everything on the subject but they're pretty dang close.
I think you're off a bit with your last paragraph. IMO a better example would be if someone listened to
this song and thought it was completely serious and not intended to be comedic. The person may not find the music funny at all-her emotions may be different than mine- but that doesn't change what the songwriters intended. If she says that the AoA literally singing "
meaningless whisper" was not intended to be funny, I'd be comfortable in calling her wrong.
People may have different feelings and emotional reactions to different works. I would never attempt to force them to feel differently. However, that doesn't mean their aren't correct things and incorrect things to believe about that work.