Arrogance mostly, one answerer here said it correctly, Celebs, want Fame, Money , Power, Prestige, But they also want something they can never have, and thats Privacy, You cannot have all the above and have privacy, they know this and it depresses them and so they get high and drink and become an idiot cause their lives are empty, Rich as they are, they are empty, They want to be treated like normal people ? Pffftttt, Thats just a Public Relations Ploy.