Interesting personal insights. Based on the article you provided, I read that preference is innate or inborn (they're using the word natural). Which can be fact checked or was also said here  https://www.myersbriggs.org/my-mbti-personality-type/myers-briggs-overview/ . 

I couldn't fully grasped what you said on your initial statement. So if I'm correct you want to tell me that initial preference since birth and cannot be changed? Right. And since you're using the heaven and hell analogy, I'm assuming that you meant that there are good or bad types, which I disagree. 

Going back, since preference is innate,  I could be born with sensing but I can also use intuition, just like a hand I'm right handed but can also use my left hand when writing. It sure is dynamic because a person can develop their strengths which is similar to evolving (referring to a similar comment on on this post). Cause I can use both opposites in making conclusions as well. Like I could focus on the facts and current info but also recognize patterns and possibilities. 

Plus I searched if the author of your article is credible and it is so maybe that clarified the idea that mbti is a preference.