Isn't it a kind of obsession/repulsion with a system identfied as "truth" ?
Freud said that neurotic ppl known that 1+1 = 2 and that this was making them ill.
Typically I feel MBTI/socionic haterz are often Ti role (probably because it feel like a limitation of the possible narcissical boost they can get from their second function)
I can easily see how we can feel that personnality typing is a limitation to the potential you feel you have coming from your second function (Ne - wich identify potentiality for your proper person - in a kind of "what I'm meant to do"). It put you in a box that secondary function hate in order to imagine a future for yourself.
Not sure of what I say.