Which came first, the chicken or the egg?That is to say, do you think people are introverts because they have low self-esteem, or do people have low self-esteem because they are introverts?
That said, I think introverts are then at a natural disadvantage in a church environment. Why? Because we all know (or are supposed to know) that "church is other people" (this introvert's attempt at a play on words). And that we're all supposed to be "involved" in church, to be with those other people, to have relationships with them, to love them and spend time with them. Which is all well and good - but it is also exhausting to an introvert, while it's invigorating to the extro-Christians. Which is why the latter always seem to end up "running the show," so to speak.
Any introverts with families are already running at an energy deficit, 'cause it's hard to get away from people living in your own house. Then you have work. Then you have family and friends. And then you have church. Just the service can wear me out sometimes. Add into that the "expected" added participation in committees, boards (just got asked to join another one), get-togethers, etc., and it makes an introvert like me want to run and hide. Not because anyone there is bad, not because "the cause" is bad, simply because it is overwhelming and sucks psychic energy away.
Does that make sense?