I would agree with Invisible Jim, not to take this stuff too seriously, and to take it worth grain of salt, but I also think that there are a lot of ideas that are worth exploring too.
I've seen this potentiality among many types- the histrionic with ENFJ, the dominant/aggressive sexuality of ENTPs, the border-line in ENFPs, the painful paranoia of the INTJ, and definitely the removed/uncaring INFJ. With all personalities there are strengths and weaknesses, and in its most extreme form it can show as mental illness.
For me personally, until I developed my Ti, I relied too much on Fe and Ni, and because my Fe was unbalanced by a strong Ti, it was scary how out of control I felt in my own life. I was controlled by symbols/astrology/dreams and didn't feel that I could break out of that cycle. There came a point that my Ni and my Fe literally had to be shut down for me to finally develop my Ti and Se.
Now that I have really worked (very very hard) to use my Ti, I am not afraid of the symbols I am confronted with in my every day life. I was able to grow past that- and this may sound weird, but I think that because my Ni was feeding off of so much out of control Fe- it was almost as though I was more of an ISFJ- because my Ni unmeted by Ti was more like an overwhelming Se.
I also agree with what other people have posted- that a lot of people are afraid to look at the fact that they might have "sensing" characteristics- which is foolish and silly. All of us have "sensing" characteristics in one form or another, it just depends on whether its a main form of information gathering, or a lesser form. Too much Ni is just as bad as not enough Ni. When intuition is unmet by our other functions we are in serious trouble- that's why its so important to develop our all of our functions to the best of our abilities.
I developed Fe more as a defense mechanism to deal with my mother, and often looked upon it more as a curse than a blessing, but now that I have developed my Ti, I can appreciate it for what it is. I think a lot of people might over-identify with other Myers Briggs types simply because they have not developed their own tertiary functions. I do think that it could also be the opposite though- that people who have developed all of the functions might be harder to type, because perhaps they have a strong feeling/thinking side. The real question is how we relate to others- primarily through expression of feeling or ideas and thoughts. Although I have developed my T, in conversation, I am more likely to convey feelings rather than thoughts- thats why I am an Fe, and Ti- I will admit I sometimes get annoyed when people switch types frequently- because in my opinion it should be obvious whether they are Fe or Fi, or Te or Ti.
Dave Super Powers on youtube has really great videos about these different functions- I suggest people who are unsure watch his videos.