I know few older men who married beautiful but uneducated women. Later they feel disappointed and married again with educated women who actually not beautiful.
There is a different between physical beauty and good appearance. Physical beauty is something that owned since someone born. Good appearance is something that could be created. Those uneducated women are physically beautiful, but they could not maintain their appearance and that made them look bad. I have seen them, they look like maid in the house, not a wife.
Different than women who are not physically beautiful but able to maintain their appearance, they will look good. And appearance is not only how to dress, but includes attitude like how to speak.
I have read few complains about "my wife is not beautiful", but from descriptions that written by those husbands, I made a conclusion, what made them felt uncomfortable was not their wives physical beauty, but their wives lack of ability to maintain appearance.