Expecting the man to pay is abusing outdated gender norms
My biggest issue with this is that it maximized women's ability to find love while severely limiting men's ability to do the same. When women hold this standard they ensure that they can afford to go on a multitude of dates as they're not held back by finances, which means their ability to find love is prioritized, while men may be reserved to a handful of dates, if even that, because they have to use the finances they use to live, which isn't infinite. Men should not have their ability to find love severely limited just so that women's ability to find love is limitless on behalf of outdated gender roles that are entirely one sided and wouldn't be reciprocated with a female gender role that is just as costly as men holding women to gender roles is looked down upon by the culture.
For this reason, I believe that this cultural norm is actually a cultural abuse put upon men by women for selfish gain.