I think being a loner is a high variance strategy. In a majority of the time, it hurts you in our society. But certain individuals will see huge levels of success. It's similar to the genetics of schizophrenia. Families with genetic schizophrenia and more specifically individuals with high chances of mental illness often see bifurcated life outcomes, they are both more likely to end up down and out, homeless, in a me…
I'm both somewhat shy and very much introverted. I don't like artificially-created social situations. But I'll talk at great length to family members and people I work closely with.
If I were in a Pleistocene tribe where basically I'm surrounded by 120 members of my extended family, coworkers, etc. etc., I'd probably talk a lot more. I like social interactions, I'm just uncomfortable in novel situations and I don't like small talk.