The religious right embraces the doctrine of "original sin". The secular left focuses on the concept of "unconscious bias". It seems to be part of the human condition across all cultures and ideologies to view people as inherently flawed, and to see the path toward sanctification as being recognition and never ending struggle against those inherent flaws.
Myers-Briggs is just the LinkedIn counterpart to this. Fodder for "Tell me about your strengths and weaknesses, and a situation in which you've had to overcome the latter" interview questions. You're supposed to don your hairshirt, beat your breast, and talk about your struggle for salvation in order to demonstrate piety to the interviewer.
Yet oddly enough just about everyone has at least one MB type.