The Chinese philosophers say that you need “conditions” to achieve equilibrium. If you’re plain but want a beautiful wife, then you need to compensate with other qualities that would cause your wife to admire and respect you (good provider, wealth, smarts, faithfulness, etc.. )
That’s why middle-age professional women can’t find husbands. Those woman are demanding but have no beauty or charm to contribute to the relationship. A successful man would rather go out with a pleasant, beautiful and charming young woman, especially if he has to pay the bill.
A beautiful woman would expect her date to pay for dinner and buy her expensive gifts (tributes to her beauty). If you’re cheap then a plain Jane is the way to go.