Your opinion, I accept that. I think the whole theory around functions and such does limit your perception towards other things, cause at some point you are starting to explain everything with those functions. It's like if you run a company and concentrate only on having the best product on the market, totally loosing the sense for innovation.
I do think very systematically, things like function theory or any personality stuff of these sorts have the effect on me that I start to order everything in my real world into this set of "natural laws of humanity" to form a working model. Not until it is a working model I can accept it. I havent run into discrepancies using function theory, on the contrary you can explain quite everything with mbti or the function model. The only problem is, noone understands what I am saying cause in Germany like maybe .5 % of the population ever heard about mbti. Therefore I learnt that I have to develop my own ways to describe my perception like everybody else, understandable for everybody else. Without doing so, people would think of me nowadays that I am a nutjob and I wouldnt get the respect I'ld like to get from people.
So you see, by living in a culture in which there is virtually no intrest so far for mbti or even something similiar to it ( pretty much every theory lands sooner or later in the astrology sector ), you have to choose a completly different approach and strategy to things. That's what I meant with mbti isnt the answer on the quest for self.