Most people I know, when they have encountered MBTI and identify with a type, react like this: "Hey, that describes me pretty well! Interesting! Now, to move along with my life..." And they don't think about it very much.
Now, I, personally, use it for self-improvement by taking note of the negative aspects THAT I IDENTIFY WITH (take note that not all stereotypical aspects of ESTJs apply to me, e.g. being overly aggressive, which I am not), and I actively try to fix them!
Now how stereotypically ESTJ does THAT sound??? Answer: Not at all! Therefore, MBTI has NOT corrupted me the way it has supposedly corrupted pretty much everyone who has taken the test, because I'm thinking and acting outside of the ESTJ box.
Of course, I have no way of knowing that what I'm doing is the average, but I'm SURE that the way people act on TypeC is NOT going to be the average either, because we don't represent the overall population. We don't represent them because we are NERDS about this sort of thing. Not everyone who takes the MBTI test and is interested in it will go to the level of nerdiness that we all went to by simply joining this site and posting on it.
In other words, before I believe what you say, I want some STATISTICS. I'm not going to believe that sort of claim until I have evidence in front of me, and the OP seemed like less of a scientific report and more of a philosophical document. And, of course, my problem with philosophical writings is that it's SPECULATION and there's NO WAY OF PROVING IT.