being an introvert does not preclude enjoying groups of people (even large ones) and social interactions. It simply means that we introverts don't 'recharge' psychically that way. Extroverts come alive and feel re-energized when they interact with 'objects' outside of themselves. Introverts come alive and feel re-energized when we go within. So extroverts still need time alone and can enjoy solitary activities, and introverts still need social interactions and can enjoy even large group functions.

I am an extreme introvert. I still enjoy community and social interactions. I have to sometimes speak before very large groups of people. I don't feel recharged doing it, but I don't mind it. I take time before or after to reset so to speak.

I have found the best of both worlds being a Buddhist more than anything else. I have plenty of time, even in group settings, where I get to go within and meditate.

So I don't think that introversion and extroversion alone in typology account for the religion/church question. Now we could go deeper into the Sensates vs. Intuitives and the Feelers vs. Thinkers for some fun discussion.