I think you're being downvoted because your opinions are grossly misinformed. 40-50+% of the US population could be classified as introverts (1). This couldn't in any way be called "a small percentage".

Introversion is a personality trait, with advantages and disadvantages. To say that introverts "should think about getting some kind of therapy" simply for being introverts is simply irrational prejudice.

(1) http://www.capt.org/mbti-assessment/estimated-frequencies.ht...