>Again the statement that most engineers are introverted is in no way defensible and its insulting to try and group us all together like that.

Of course its defensible. From the abstract: "Engineers scored higher on Tough-Mindedness and Intrinsic Motivation; but lower on Assertiveness, Conscientiousness, Customer Service Orientation, Emotional Stability, Extraversion, Image Management, Optimism, Visionary Style, and Work Drive."

https://www.sciencedirect.com/science/article/abs/pii/S09234...