I disagree with dividing things up by introvert or extrovert appeal...because it's often done by people who have a very disdainful view of extroverts.
I don't think there is anything about tarot that inherently says introvert, unless you think that all extroverts are kinda dumb. Academia, for example, is not solely or even *mostly* the realm of introverts...because a lot of teachers are actually extroverts. It's entirely possible to be a quiet and nerdy extrovert, because the actual defining feature of introversion vs extroversion is whether being around people is revitalizing or draining. Not every extrovert loves getting down at the club. That's not what it's about.
Especially if you view tarot as a way to connect with the world, spiritually or otherwise, or if you use tarot to explore ideas about other people...or if you just like reading for other people... those are all very extrovert-y type things.
But then again, as you may have guessed, I'm a extrovert (who likes parties and getting down at the club and *also* academia) and on the defensive in this kind of discussion.
I also don't particularly like the Meyers Briggs, or at least I don't like how people don't acknowledge the ways in which it's controversial, so, ehhh.
Introvert vs extrovert and tarot, though...every so often we get threads on here about whether or not people find reading for others draining or energizing, and I wonder if that might correlate strongly with introversion or extroversion, as opposed to being more of a spiritual or energy thing (though it could be both, who knows).