I agree completely. I've met a lot of types who are nothing alike but their functions (specifically ENFPs for some reason ). All I'm saying is that I could imagine it could help to know how a patient takes information in. Like, I don't think that the same questions should be asked to an INTJ as a ESFP.The counselor I see has heard of the MBTI. When I first met her, she seemed more interested in it than she does now. She let me borrow the book she had about MBTI in children and copied a couple pages from some other book. But recently it came up and I had to remind her of the dichotomies, which was slightly disappointing. Doesn't really bother me much though, as I'm more of a CF fan and she didn't have a desire to go that far into the theory.
While I think there could potentially be a use for MBTI in counseling, it shouldn't be used as a shortcut for "knowing" a person. There's a ton of variation, so just because you know their type doesn't mean you know what they're like.