^This. Teen marriage has been replaced by teen pregnancy. And now women are freezing their eggs so they can "wait until their ready" to have kids. So eventually we'll have 60 year olds picking up their firstborn toddlers from daycare. Divorce is super high because women don't need men like they used to so they don't put up with as much as the used to. I represented a man who's wife divorced him because he snapped at her for nagging him about drinking. She drank just as much but she didn't want either of them drinking when her daughter was around for the weekend. There are new realities that cause new challenges and society by and large is clueless as to why.
Good insight. Perhaps the PUAs are a symptom of the arressted development of society in general? By that I mean the insistence that teens/20s/30s delay adulthood and live in a state of adolescence whereas in the past, there wasn't this strange period of years 12-20 where one wasn't quite an adult but not a kid and didn't have to - for lack of a better term - grow up. My grandparents were married at 19 and 16 and started a family, worked real jobs, etc. nowadays, we're appalled at 16 year olds getting pregnant and tell 19 year olds that they've got at least 4 more years to party at college before they have to enter the real world. Everybody in this age group is told by society that they can live it up without consequences and sow their wild oats for years. So instead of growing up, you get a bunch of adult adolescents that can't understand why they're so miserable, and then go our to the bars and clubs looking to fill a void they're not acutely aware is present.
Or I could be just rambling incoherently now...
I do like the "teen pregnancy has replaced teen marriage" observation. That's something that could be expanded upon. There is the biology aspect that is undeniable that when teens get flooded with hormones, they're going to start having sex.