I've taken the Myers-Briggs a few times throughout my adult life and have always come out strongly INTJ. I've yet to find a description in these that I feel does not describe me, so in my case, I think it's accurate. A couple of times, the tester has told me it's one of the rarest combinations which was interesting to me because both of my parents, my brother and my sister also got INTJ results and I understand these classifications are thought to be a person's nature, not due to nurture. Recently, our HR Director at work got Myers-Briggs certified so all employees went through it (whether we had before or not) and several co-workers reported they were told they had a rare combination, which was different from mine. So, maybe they're all rare? Maybe the testers are full of it?
Anyway, to your question: yes, for me, I do think my personality tendencies drew me here and allow me to fully embrace these ideals. One of the characterizations, according to Myers-Briggs, of our type is "It's not MY way, it's THE way". And that resonates with me. I see almost nothing as me being right, or knowing more, or being better than other ideals; I just see most things as only one logical to be ... "THE way". Mustachianism is one of those things. So, I have to constantly, consciously, remind myself that other people hold different beliefs and approaches to life and to not be so judgmental. At least, not out loud.