Parents provide limits for children, and parents provide boundaries for children. So naturally we orientate ourselves by the limits provided by our parents. In fact we feel secure within these limits.
And we feel so familiar and so secure within these limits, we can't see outside of them.
And although the limits are artificial, our perceptions are altered by living so long within their limits.
And so we look for artificial limits such as astrology or MBTI to feel at home.