> How can you have someone that doesn't like talking to crowds be a politician

Calvin "Silent Cal" Coolidge. (Possibly. He wasn't averse to press conferences, certainly, but he certainly cultivated the image of being a, in his words, "solemn ass" and was pretty universally known as a reticent man.)

> someone who avoids cameras be in the entertainment business

J. D. Salinger. Thomas Pynchon.