You would do that because that’s how you are socialised as a woman growing up. Your value is your youth and how beautiful you are. That’s it.
It is not easy to just rid yourself from socialising. As a man this can be hard to get when it’s about beauty standards because beauty standards imposed onto men are not even close as restrictive as those imposed onto women.
There are many examples for unattractive, funny looking, old, chubby, etc. male characters in media. For female characters that’s the exception.