Those are siuntal/silke's personal typings and not representative of anyone else or this site. Most of what you wrote isn't really relevant to his type. It makes a argument for a type but really doesn't make him a type. If IJ is direct avoidance of Chekhov's gun, then it's anti-Ti. His thesis is also anti-Ti, it matters very little if he wrote it if his content is always anti-Ti. His message is what matters, not the fact that he wrote some philosophical thesis.
""fiction's about what it is to be a fucking human being", and he expressed a desire to write "morally passionate, passionately moral fiction" that could help readers "become less alone inside"."
This is what he wrote about his fiction, and to be quite frank. "Morally passionate, passionately moral fiction"??? ILE? Not likely! Become less alone inside???
Ultimately his hemming and hawing about ethics and morality is indicative of conscious strong ethics. Anyways, it matters very little what you believe someone's type is, but don't go thinking that a types can't write a philosophical thesis or learn about logic. That simply not true.