Since physical beauty is only a chance arrangement of molecules on a bony frame, do we make too much of it?

Also, standards of beauty are changeable from one culture to another, from one decade to another, from season to season, and even from day to day. Look at Marilyn Monroe, for example, because by today's ultra-thin standards she was too plump (although not in my personal opinion). And how long will today's anorexic standards of beauty last ?