Only you know who you are, and too much of anything isn't helpful
Learning about psychological Type is a life's work, and I really enjoyed reading "The Collected Works of CG Jung - A revision by R.F.C. Hull of the translation by H.G. Baynes", published by Bollingen Series / Princeton in 1990. The following are quotes taken without express permission from this book italics are mine. Let's begin with
“Classification does not explain the individual psyche. Nevertheless, an understanding of psychological types opens the way to a better understanding of human psychology in general.”
This quote is über-important, say, in case you're filling in a questionnaire and anyone is trying to tell you who or what you are.
They don't know. Only you know.
It also shows that Type doesn't explain everything, because humans beings are too complex to be ever completely understood. Jung was humble and realistic enough not to insist his way was the only way.
When talking about the importance of balance among Extraversion and Introversion in regard to the cognitive functions Sensing, Intuiting, Thinking, and Feeling, he had this to say:
“In reality, however, these basic functions are seldom or never uniformly differentiated and equally at our disposal. As a rule one or the other function occupies the foreground, while the rest remain undifferentiated in the background. (... A) one-sidedness (of Extraversion or Introversion) would lead to a complete loss of psychic balance if it were not compensated by an unconscious counterposition.”
Does that mean that in an ideal world, we would all have access to all functions equally?
I'm not so sure. After all, isn't it the differentiation that lights a fire under our inner drive to become who we can truly be? Awareness of your strengths and blind spots is crucial for conscious development, and as we see today, Type knowledge has applications in stress, change, anger management, relationship counseling, communication and leadership styles, to name a few. Can you imagine living in a world where everyone is enlightened and able to access all eight functions equally well? All mental healing professionals would be out of a job!
For now, I'd be more than happy if these concepts were taught in Kindergarten so that we raise if not a balanced then at least a well-aware next generation.