The reason is that everyone has different tastes.
Sure there is a general trend of what most people like, but there's so much discrepency that it's almost pointless. If one person likes girls who are tall, dark hair and thin, he sees a girl who meets this expectation (let's call her "girl A"), he will think she's a hb9. If another person likes girls who are shorter and more curves, light hair, big breasts, then to him "girl A" is a plain hb7. Everyone has their type or types. Preferences with race and style differ greatly from guy to guy.
Sure there is a general trend of what most people like, but there's so much discrepency that it's almost pointless. If one person likes girls who are tall, dark hair and thin, he sees a girl who meets this expectation (let's call her "girl A"), he will think she's a hb9. If another person likes girls who are shorter and more curves, light hair, big breasts, then to him "girl A" is a plain hb7. Everyone has their type or types. Preferences with race and style differ greatly from guy to guy.