I have met very few men for whom prospective partners' body counts is a red line. It might be a
preference, but it's always in context of the larger picture.
I think there has been much topical research on this now, and from what I can glean, there are at least two forces working at the same time.
1. Gendered preferences didn't change, but society did. Women still prefer men who earn more than them (by a very wide margin). This would be okay if we still lived in the 1940s, but childless women outearn men now in most metro cities. Sometimes by a wide margin. Women are graduating in high-paying professions at ratios of 60:40, 70:30, and even higher, meaning this problem is getting much worse. Increasingly, the majority of women are focused on the top 10-20% of men who outearn them, to the exclusion of all other men. This is compounded because incomes are just one of many selectors. There is also height (which remains a surprisingly strong preference for women), attractiveness, many personality traits, social standing, wealth, political affiliation, etc.
2. Dating apps have made the above exponentially worse. It's very easy for a woman of average attractiveness (I say this in a academic sense, not derogatorily) to only swipe right on the most attractive men. Those men are perfectly happy to have a lot of casual sex with said women, but would never consider them for marriage. This has warped the perception of their "league." Many of these women end up 40 and alone and deeply unhappy. Or they "settle" for a man of average attractiveness and income and resent him.
This is almost impossible to untangle. We don't want women to be less educated, or earn less. We don't want them to feel like they're "settling." At the same time, there are many amazing men out there in their league, and they could have a happy marriage. I applaud Singapore trying something, because the future of the West looks like a lot of angry, bitter, single, childless, lonely people.