Whatever the cause of this, personality traits are not evenly distributed. I know it's not necessarily an accurate system, but the MBTI is a consistent way of classifying personalities. The distribution of types varies a lot:
https://www.myersbriggs.org/my-mbti-personality-type/my-mbti...The biggest disparity seems to be between sensing and intuition, where sensing relies more on experience to make inferences, while intuition relies more on abstraction to make inferences.
Whether this is evolutionarily optimal or just a side effect of other forces I don't know.
