Dear member, if you need MBTI to give you insight into your fellow man, you have no business calling yourself intuitive.
I think need is different than using all possible tools as your disposal. Intuition requires clues. Uncovering clues requires time and relationship. When you are dealing with large volumes of immature people, I think there's merit in having lots of different tools depending on the job they are needed for. If it's the only one, yeah I can see where the problem is though.
What if you are going flat out, spending your days, after schools and evenings and it still isn't enough? I don't think there's any shame in using everything available to try to speed up the process of understanding someone better. (Not categorizing and stereotyping them) If you've read anything I've written, I believe attachment is probably the primary most effective motivator and teacher. But attachment takes time and in the meantime, 30 thirteen year olds will not wait until November when you've gotten a chance to connect with the majority of them in some way that is meaningful to them. Do you really honestly believe from what you know of me that I'm in favour of just stifling people generally by shoving them all into rigid MBTI boxes?
Now you're just being difficult! (*walks away huffily*)