But I think that is the perfect explanation of what is going on here.
Categorization based on purely logical things (with people treated as things, rather than "unique individuals") is associated with Ti. To a dominant Fi type, Ti is the 8th function (not in strength, but in the ego's ranking order), paired by Beebe with Jung's "demon" archetype. IT can even come off as evil, because it is so opposed to their dominant, or "heroic" system of personal classification. Their preferred world of judgment is internal. They have rejected logical considerations from that world, and chose values instead (and will turn to the outside world when they need logical considerations; hence using it's lack of "empirical" credibility to put it down). You've likewise rejected values from the internal world, and chosen logic, (and will turn to the outside world for values; hence addressing this publicly).
I myself had the same problem, when I was in the process of learning all this stuff (ironically), and had stumbled into a heavy Fi environment, that would listen to "experts" discuss type theory, but not want to hear it from anyone else, unless it was strictly how it applied personally.
You can clearly see the root of the clash in these responses:
So instead, you're reacting to their reaction, which is their heroic Fi trying to slay the Ti demon. Fi, to your type, is the 7th place "trickster", which is the "bad child" complex. And that's exactly how you're reacting to them. Like these "bad children" disrupting the forum, "whining" (as you call it; a definite allusion to scolding a child) about MBTI, and then "parenting" these children with your Thinking, (and complaining back, with your own "childlike" Fe).
Overall, many Fi users will overlook the impersonal categorization and enjoy the personal reflection the theory provides. Victor and now Tater; I'm not sure where exactly they're coming from, or what they want in all of this.