You could actually link the want to be an INTJ to the subconscious mind and its structural subroutines of boosting the self-ego. Do some research into the subconscious mind if you don't believe me.
To extend off that idea, a lot of people end up classifying themselves as INTJs. A lot of INTPs do, as do ISTJs and INFJs. I think one of the problems is the concept of Ni, and the ambiguity behind it. A lot of people express it as "If you don't understand it, you aren't INTJ" or "Ni is unexplainable" or "Ni is a blackhole that sucks in data", but none of those accurately convey Ni. Even the founders of MBTI had some issues with Ni.
I often think that the fact that there are so many subjective definitions of each function (and not everyone agrees with each definition!) may in itself be a failing of MBTI as a theory. It is rather hard to make predictions of the model when no one can definitize a function, least of all understand it.
There is also an issue of neuroplasticity and the changing structure of the brain that can lead to issues with MBTI.
I've been studying MBTI for almost a year, and I still can't decide on a type. I've gone from INTJ, to INTP, and I am now seriously considering INFP given my childhood (it shows glaring dominant Fi that even I can't ignore.) MBTI is a frustrating theory; it is open to much discussion, which is a bonus, but it also has issues with tying itself up into a recognizable form.