I'm skeptical as to how you guys are defining "extroversion". You write that extroverts are naturally self confident and hard working. Being an extrovert really only means that you draw energy from other people. Meaning that an extrovert seeks social interaction to make them feel happy.

I'm definitely an extrovert. I constantly want to be around people and when I am, I'm not uncomfortable being the center of attention. When I'm not around people, I get very lonely FAST. However, I wouldn't say I'm self confident. Maybe I'm confident in my abilities to entertain others, but I'm still anxious that people won't like me and sometimes if I don't draw attention to myself, I get scared that they hate me.

I also know a LOT of introverts who are a lot harder working than me. It's hard to sit in a room and get work done when you get really down being alone after two hours.

Being an "introvert" doesn't mean that you are inferior or worse than other people. If all of you were to magically become extroverts, it wouldn't just magically fix all of your problems. It's possible to be an extrovert with social anxiety. It means you emotionally need to be around people but are scared to do so. It's horrible.