Not strictly, no. That’s just an observation I’ve made for the past 40+ years. More clinically, I would say that extroverts are people without rich internal monologues who can’t be bothered to think (or be alone with their thoughts).
Extroverts run media (because they need to talk incessantly, feel “popular,” get their egos stroked, and basically just have people pay attention to them at all times), so it’s ingrained in everyone from a young age that extroverted behavior is more socially acceptable and that extroverts are “friendlier.” Really, they are just selfish and needy messes.