i my own case, i used to assume that my inability to plan and inability to strongly feel that i want something would make me fearful and rigid and put in demand of external structure, like school, to get anything done at all. at that time i tested as moderately J and believed in mbti (j=Ni) and felt perfectly described by both Ni and Fe. I thought that would make sense for a while, to assume that i am judger because, being intuitive, i am mental as hell, and allays in doubt, not inclined to spontaneous and significant action, other that spending my free time totally spontaneously at the computer or on park benches. but when i got to know a lot of people, i gained a different understanding, and realized that some of those who display introverted feeling as cognitive stile, can be incredibly meticulous, especially if male, obsessed with the driest programming tasks, like databases, rather than having an interest in functional aspects of software, eg GUI. also they are ignorant to value standards of other people which allows them, to feel strongly that they are up to any task. therefore they will not hesitate to approach goals. this makes some of them unstoppable planners, people who are deliberate to get to where they want to be. such stubbornness is certainly better described as judging.
i played with the idea, that i might be FI and totally out of touch with the corresponding values and hence directive for leading ones stomach emotionality. but this does not seem to work out, because of the implications such a reinterpretation would have, for other people i know, who have either Fi or Ni.