It could just as well be said that a bunch of scholars disconnected from the culture, history, and technique of fine arts (except as objects of scholarly interest) are wildly speculating from the outside about the nature of the objects, and people interested in these things are starting to ask "Why are these silly things being said about the topic I'm interested in? Are the people behind this pranksters?"
Anyways, if there is a misunderstanding here, which I don't doubt is the case for at least some of the people involved, why can't the discourse be had in public about it? The question has been asked as you suggest...publicly. Polychromic revivalists are free to respond in public, and we can all benefit from hearing the more nuanced perspectives get expressed.