Why do bodybuilders have temper tantrums when people say they do not like their look?

Think of it from...: ...Their viewpoint: they spend unimaginable amounts of time and effort to achieve a look that will impress people, and you are not impressed.

Think about it: These people work very hard to look special. Most of them are not abusing steroids, but have a healthy, often lonely lifestyle focused on building strength. Not everyone thinks massive musculature looks nice (some might even be jealous). But do you generally put down other people's achievements? Do you tell other athletes 'It's not worth it?' Instead, why not just say 'You must work hard.'