I agree with these observations about how introverts might vent and sell out their knowedge and creativity. For that matter, most people are mixed in that they're partly introverted and partly extroverted. Only the ratio changes, so my article simplifies for effect. Still, those who are more introverted than extroverted likely would prefer to be anywhere but at a loud dance party. There are lots of ways to sublimate the deep dive into subjectivity.

Whether introverts can change the world for the better is sort of neither here nor there. Who says introversion ought to have a redeeming social function? Maybe self-knowledge is a curse that threatens to subvert the social order. Maybe introverts ought to be marginalized for the same reason you'd keep a lethal weapon under wraps.

Of course, I think art and self-knowledge are imperative, but they're likely also more dangerous and counterproductive than useful, especially if we're assuming a conventional sense of utility that presupposes the goal of maximizing happiness. I'd expect introverts to be sadder than extroverts on average, an assumption which the article below supports. Ignorance is bliss, after all.

https://www.sciencedirect.com/science/article/abs/pii/019188699090157M