Girls mature physically and mentally at an earlier age than boys. A 9-10 year old girl will often be taller than a boy her age. But girls plateau at an earlier age than boys, and the boys catch up and pass them. This is why I advised my oldest (early 20's) daughter to look at guys up to 30, rather than exclusively those her age.
A lot of guys never mature enough to satisfy some women, but part of that may come from women judging maturity according to a standard of "behaving like women think they should behave".
In college, the game for a long time has been for women to correctly recognize guys with good potential, and snag them before less-discerning women notice them. Women in the 30-35 age range keep whining that "the good men are all taken". Well, yes, that's what happens when you wait.
——— Women in the 30-35 age range-——
if unmarried, are spinsters but may not know it
You are correct, and I wish I was taught this type of thinking as a young woman. A lot of women my age were taught about how to get ahead on our own and not a lot about dealing with men. My mother openly ridiculed relatives who “had to have a man” “get to the alter first” or “fawn over their husband.” All this gets you is a chip on your shoulder. I am not married and have surpassed the big 40. I wonder why.
I have exactly two single female friends over the age of 30 (one is in her 60’s and divorced). I’d rather spend time with my happily married friends or those not desperate for a partner than miserable complaining single women.