To this day I still see him fight this battle, but by being aware of the “traps” inherent in his particular profile he is able to be a more productive person.

Okay, that's a good example. But do you really think that this trait was only detectable by the MBTI test? Decades ago, when I was still a child, I recognized the exact same trait in my father, and I personally try to avoid it in my life because (like most people I suppose) I don't want to turn into my parents.

And here's a question: Because I recognize a bad tendency in myself and fight to correct it, does that mean I fall on the corrected end of the axis or the tendency end of the axis?