https://www.changingfaces.org.uk/advice-guidance/confidence-self-esteem/appearance-self-esteem/
"Physical appearance and self-esteem are often closely linked. Our perception of how we look can have a big impact on the value we place on ourselves and how much self-confidence we have in our day-to-day lives."
https://brainfodder.org/psychology-clothes-enclothed-cognition/
"Science says that the clothes we wear affect our behavior, attitudes, personality, mood, confidence, and even the way we interact with others. This is “Enclothed Cognition“."
Is it really so hard to believe the way you look can affect the way you feel?