Men can judge a mans character better compared to that of women judging the character of men. Not including homosexuals, men only judge other men on their character and not on their sexual attraction. Of course subconsciously, objective standards of positive physical attributes (e.g. symmetrical face) can bias a mans opinion of another man, most of it is to do with the mans character and use in a society.

Social media has allowed women to be at the forefront of choosing a dating partner without the input of other men. They can 'window-shop' and judge a man solely by how he presents and perceives himself compared to how other men perceive him. Before women would observe how a man fit in with other men (e.g. how dominant they were, how competent they were compared to their peers) and select the men based on this.

However women are biased by their sexual attraction to males, which influences how she perceives the mans character i.e. more physically attractive to women means better character subconsciously during first impressions.

Of course after dating for a period of time she can better judge a mans character but other things get in the way. They become infatuated by the man due to the chemicals released during sex (nowadays sex ofter happens very early in the relationship not after marriage when the woman could better judge the man she was dating without the hormones released during sex) and this in turn means that they are more biased.

Men with positive character traits who are physically unattractive cannot get their foot through the door (if women were to solely use online dating which I know is not true but it is increasingly popular) and therefore they are becoming excluded from dating.