1. What's "narrow" about the variety of dark content shown in, again for specific, real-world examples, Midnight, Xoth, Lamentations, Hyperborea, Viking Death Squad, and Shadowdark?
2. Who has gotten aggressively dogpiled, and [3] exactly for what? What's "obvious" to you doesn't seem apparent to me. The books I see getting published seem to show the opposite. People can and do publish all sorts of stuff.
I think he's [Kyle Brinks] talking about trying to sell mature content to a general audience, and about their own publishing policy about portraying particularly brutal subject matter, like slavery. I think the particular "problematic" elements they're mostly dealing with are A) slavery, B) cannibalism, and C) Psionics, just logistically because they haven't figured out a way to do it that they like.
4. What's your alternative theory?
5. You think writing for LotFP tars one by association with edgy content? Or is the association issue the fact that James Raggi III strongly supports ZS, a writer who's a
notoriously abusive and nasty narcissist, and
apparent domestic abuser?