P.s I'm not talking about pretty girls I'm talking about really beautiful girls drop dead gorgeous the ones you stop just to look guys and girls.
Most Helpful Guy
Besides the fact that hardly any guy feels brave or confident enough to so much as talk to her, the girl has no real value in her life (usually). Her family has always treated her like the pretty girl, always told her she was pretty, was hit on left and right by guys in high school and beyond, learned that she could easily get what she wants, can find men willing to kiss up to her and give her everything she wants...and all this could lead to her feeling like she has a dull life. On top of that, I'm sure at some point (for some it's when their looks start fading) a lot of pretty women might realize that they don't have as many strengths as they thought they did, or never stopped to think about it. This could send her self-esteem crashing.
Most beautiful women know they are, meaning it's a conscious thought for them a lot. They know they have their pick of the litter, and the litter is acting like puppy dogs or players (usually no middle ground) to get to her.
Lastly, pretty girls probably wonder if they are being chased because of their looks alone, because they would make a good trophy. Pretty girls have the stereotype of being shallow, playing games, and tough to get...which makes the 7's or 8's into the desired ones. They seem more stable and don't have all the drama attached like the 9's or 10's might have.