"Ultimately, the rich drive the Mercedes, the middle class drives the Toyota and the poor ride the bus. Similarly with physical attractiveness, beautiful people end up with others who are very beautiful, average looking with average looking, etc"

I think that is a rather basic, one dimensional way of looking at perceptions of beauty or physical attractiveness. It is not uncommon for one person to think someone is beautiful while another thinks they are not. Physical attractiveness is incredibly complex and reflects trends that societies set. For example, 17th century paintings celebrate straight noses, small mouths, high foreheads and pale skin, a definite contrast to today's beauty standards. Some women like tall, slim men with tattoos. Others value more muscular physiques. Some men prefer blonde, petite women with big lips. Some men prefer tall, buxom brunettes, etc.

Some people tell their peer 'She's way out of your league' because their perceived standards of beauty don't meet. But the subject may in fact find the peer attractive - just because one person finds another person attractive does not mean that this is universally agreed.