A big part is from women waiting too long.The
Don’t assume that men will be as enthused in your 30’s as they were in your 20’s
DING DING DING! I keep saying this. A woman's attractiveness to men roughly her age falls off a cliff when she hits 30. The feminist message that women should act like men in either putting off getting married until completing their education and getting settled into their careers or that they should spend their youth playing the field or indulging themselves with travel, girlfriends etc and only once their youth was gone get serious about finding a husband was the worst possible advice anybody could ever give a woman. Youth is incredibly valuable but is fleeting. They need to use their peak attractiveness - their early to mid 20s - to get a good guy they can have kids with and grow old with while they have it. Women and men are different and want different things. Its OK to admit that.