I don't know if you missed the fact that this was also my argument.

The focus on women -- particularly, if you are, or want to be, romantically involved with them -- is because women (correctly) assume that the way you treat them is a reflection of your overall character.

If you have a strong incentive to treat her well, but you can't help but be callous or indifferent, it's safe to assume that your behavior would be the same, or worse, toward everyone else. You literally couldn't even pretend to not be an asshole, for one evening, even though it might have gotten you closer to her.

And the higher her MMV (to use the crude term), the more harshly she will judge your behavior toward other people. She's smart, discerning, and far-seeing. That's one of the reasons you wanted to date her. That's one of the reasons her MMV is so high.

She knows she won't always be at the top of her game. She knows the baby might scream all night. She knows her disabled brother might need a place to stay, at some point. She knows she might be infertile or become chronically ill. She knows married life is full of surprises, many unpleasant. She knows.

She knows. And she's watching you.

Make sure she gets home safe, or GTFO.