system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why do people who work in an office who never leave the office and are never seen by anyone other than coworkers required to dress up?
gpt
What you wear influences how you feel about yourself and how other people feel about you. Which means that what you wear has influence about how you behave and about how people behave towards you. What you wear sends out signals to yourself and to other people.

That's part -- *part* -- of the reason why a judge wears a robe, a doctor a white coat, a nurse scrubs, a "professional" a suit and tie, a christian a cross, a person from the country a camo shirt, someone who identifies as a redneck a shirt with sleeves cut off, a cop all his or her various adornments, etc. How we appear sends out signals about who we are to ourselves and to other people.

When you're representing a company and supposed to be professional and interacting with clients then it's clear why you might have to wear a suit and tie: to signal to the client that you are a professional.

Client or not, you're going to be interacting with your co-workers and vice versa. As a general rule businesses think that it would be a good thing if all y'all employees interacted with each other in a professional way. Having to dress professionally reminds and encourages all y'all to behave professionally and treat each other professionally.