Enneagram type 5 considered only for introverts

[MensSuperMateriam]

This whole idea is far too binary, black-and-white to be accurately applied to most people.

Only if we think in functions as real. What I said applies viewing function Xe as a pole in a range, and Xi as the opposite pole. I do not agree with the way functions are usually seen or interpreted. In my opinion they are much more like "forms" or "apparances" that surface from underlying psychological processes, not the same processes. Explaining this in a detailed way would require a lengthy post and a proper thread.

More or less agree with the rest you said.