Not all attractive people do that, those with inflated egos and no sense of empathy or caring for others would.. and those people won't go far regardless of their looks. in the end personality holds it all together.
What is your definition of "attractive"? I completely agree with the notion "beauty is in the eye of the beholder." Of course, there are always extreme cases. An overwhelming majority of people find Kim Kardashian attractive and that same overwhelming majority would find Madelyn 'O' Hair ugly.
No disrespect, but I kind of have to disagree with you on this. Some people may behave that way, but my experience with attractive people is that they are often unfairly characterized by jealous people. They aren't much different in behavior than anyone else, aside from being the target of envy and people with sexual entitlement issues. If you've run into problems, that sucks, sorry about that, but it just hasn't been my experience at all.