Your claim as to its history is simply not true, and its use has, obviously, been mostly limited to the community that generated it. Did you expect Ronald Reagan to use it in his inauguration speech?
Other than that, I don't see what point you're actually trying to make here.
Organically developed, like, a community making a new word that fills a lexical need to describe a concept? Sounds a lot like "Mx." to me. What's stupid about it?
You just read an article about a non-binary person, so I think we can assume they are, indeed, "a thing." Something tells me you don't interact with a lot of queer people anyways, so your acceptance of their terms of address feels pretty irrelevant.
All titles are "made up," and Mx. as an honorific has been around for almost fifty years. A better question would be why our two main honorifics for people are so pointlessly gendered.
I still use Skiplagged pretty exclusively.
The Holy Roman Empire.
I can't believe this map includes Castile, but does not make any mention of Al-Andalus. That's one of the most interesting epochs of Iberian history!