It seems you are talking about men's willingness to ignore personality flaws, not physical ones.
The answer is that men are, generally speaking, more interested in physical looks, so they don't care if the woman is shy as long as she's nice looking. Men are willing to overlook personality flaws as long as the woman is physically the way they want her to be.
Women, on the other hand, are, generally speaking, more interested in personality, so if the man does not impress them with confidence and acts like a wimp, they'll eliminate him as a possible match, even if he's good-looking. On the other hand, women are willing to overlook physical flaws as long as the man's personality is the way they want him to be.
So, generally speaking, men are willing to compromise on personality, but not looks, and women are willing to compromise on looks, but not personality. That's just the way both genders are.
By the way, this part of the forum is open to both men and women. Anyone can post here. So you can't really demand that only men answer you. If you post a thread, anyone here is allowed to respond.