1. They don't know it themselves and you'd just make an enemy for nothing.
2. Not everyone knows it, otherwise they wouldn't have a job. Or they're being accepted for other reasons. In both cases, you're pissing someone off, probably higher up.
Fat people doesn't like you when you call them fat. It is the same. People are emotionally influenced by things you say even if nothing of it is new to them.
2. Not everyone knows it, otherwise they wouldn't have a job. Or they're being accepted for other reasons. In both cases, you're pissing someone off, probably higher up.
The ego boost is not worth it.