[cSoze]

It seems to me that the false dichotomy here is equating (fit or problem solver) and (gregarious or reserved). Gregarious/reserved are opposites by definition.

"If you've believed the Or model of introversion and extroversion your whole life and resist the And model, try this challenge: try believing the And model for a week or a month."

I believed in the And model until I was ~23, it made me exhausted from all the pressure to be more extraverted. I've believed a soft Or model for 5 years now and I'm a hell of a lot happier having accepted my introverted lean.