I think is for the degradation of family values, that women are looking for the 15% top percent of men, and they get them, problem is lot of times these 'winner men' don't settle, but they still perceive those men are for them and don't want anything 'lower'. And there are guys who would want a family and fidelity, but are not those top 15 percenters.
As a result now you have lots of single women with kids, broken families etc.
All this for having bad values, men and women.
If someone else has a different perception i listen.
I think women have always sought the strongest, productive, mentally stable, able-bodied, attractive, intelligent men they can find. We're hardwired to do that. If men would stop impregnating women and abandoning them and their offspring, then there would be fewer single women with children. Some men think they are entitled to get a pass on assuming responsibility for the children they father and blame women for their lack of responsibility and commitment to the mother of their children. That leaves single women raising children alone and prompts women to recognize that they can do it all alone because they have been forced to do it all alone. The USA is awash with deadbeat dads who do not want to support their children.