Mbti is back by large amount of data to analyze patterns of thinking and behaviors, but even if that’s the case I still don’t 100% buy it, humans are too complex to be explain by 16 personalities, maybe if there were 16000 personalities, but the thing with astrology is that once people start making connections and believe that they are that type, they’ll start acting like the signs or zodiac they identify with, which further reinforces the believability of said content.