But the answer is simple.
Unless they were the type of woman who already had financial acumen, it didn't impact their finances.
Because we (men) aren't spending on things that would impact a woman's finances in a positive way. We're spending to keep them entertained. That's money down the drain. Their finances will remain unchanged.
Now, a smart woman would recognize having a financial partner means more money to save/invest, but we all know 20-something people aren't mostly thinking about that, especially social-media addicted women who are trying to keep up with one another.