I think this is very good insight. We all use tools like astrology, myths, totems, philosophy, routines, heroes/icons, politics, culture, chiropractic medicine, religion, etc. to help us navigate through life. There is no right or wrong, there is just preference.

I know several people who are very dependent on these personality definitions as a framework for their self-identity, and I would never suggest to them that they were wrong to do so. It makes them happy.