It demonstrates their superiority over other women!
Now hear me out. Women want to make a statement with their shoes. Often times, they are regarded as the cornerstone of an outfit. A woman's ability discern a fitting pair of shoes demonstrates her ability
to derive the essence of all things that women hold valuable. Of out the millions of possible options put before her in shoe selection, she was capable of finding the one pair of shoes that coordinates with such precision that her judgement is beyond reproach. Thus, she is clearly superior in all things womanly.
In summary:
