I've read a lot about Myers-Briggs. I'm sure some people practice MB the way you describe, but some people don't, specifically: (1) the source of MB is Carl Jung; (2) results place people at different points between the poles (i.e., you can score midway between introvert and extrovert); and (3) scoring midway is considered a healthy thing to do. To the extent results are not accurate, I suspect that's largely because: (1) scoring people based on their self-evaluations has its problems; and (2) people move around on the scale depending on the situation (e.g., an introvert's introversion increases when among extroverts, but decreases among introverts with similar interests). I worked in the tech corporate world for 10 years. You and me have clearly seen our share of pathologies, and we know they are very real, immoral and destructive. I'd offer that the fact that personality tests have been used by bad people for bad ends is not in itself an indictment of personality tests -- just as what you think of kitchen knives is a function of whether you see them used by psychos or by chefs. You raise issues that deserve penetrating analysis, but to be sure other purposes beckon for writing on this topic besides illumination.