Bill Gates' wealth is the living proof that even introverts and nerds can succeed in the business world.
Introverts and socially-inept smart people should look up to Bill Gates as a model, whether than go on self-pity mode and say that "my chances are slim because so many people are better than me."
As to whether Bill Gates is an ENTJ, we will know the truth in:
(1) When he takes the MBTI test
(2) When he publish a biography talking about his life
(3) When he died and scientists start dissecting his brain