Then you're fine, most women however, do not share your quality, so I wouldn't exactly say no to your brother's or cousin's decision. There's simply not enough quality women to go around, sometimes one just has to take what they can get as it's not exactly up to just their preferences alone - they have to be realistic.
Or, they simply have never met anyone who blew their minds away. That's what happened to me until I met wifey, and hell did she really mess up my world!!!