This was so good, and I've resisted commenting on at least ten other points but, I have to say this: five minutes ago, before reading this, I had just made a list over what's right about my teenage son and his introversion and hung it up on his wall. Inviting him to see why he should be confident in his introversion. "The list right there," I told him," is everything that is right about you." And I'll keep adding to the list with a lot of the points you've made here. I can just see him as a grown-up in the same situation, having the confidence to do the same, because he too found the confidence in being an introvert.