I don't care if you're a lorewhore or not. When you spout off that its not there when it blatantly is and then keep saying its not after being shown that it is, what the hell does that make you?
It's not very crucial information at all. Why? For the same god damn reason greek myth isn't crucial information to us. We still to this day wonder what the living frak was going on in Greece five thousand years ago and the best we can pin down is some supernatural tale ala the battles involving Troy where the gods are literally involved and helping key heroes literally related to other gods kick major ass. You want to guess how real that BS actually is? It doesn't effect our society today at all unless you study it as a student and professor.I can't believe GRRM and D&D didn't have their ideas as to why all this is going on. This is very crucial information.
This stuff didn't effect The Game of Thrones society 6,000 years after the first war against the Others because even the Night's Watch didn't believe in their existence anymore but for the fact that yea...screw it....two warning blasts over the horn meant the Others were coming. Even though we knew in our bones they were extinct now. Every myth for which we can't find anything legitimately proving of them means what? Bull in modern society. It only meant something once they fought the zombies. It only meant something to the South once they brought the zombie south and proved to them that yes, they existed.
The myths and origins? Useless but for the stories characters told to themselves.