I think it’s possible that being considered good looking by many people may lead to high self confidence, that would explain how someone might get ahead in a workplace.

It’s not been my experience at all that good looks mean someone is treated more favourably by management (is that what you were meaning?) in my workplace (past and present) ability and attitude are what gets a person ahead. What you describe sounds like a toxic workplace, if it the case that people are favoured by their appearance.