I wish you were right...but the reality is , in most of the world, and -perhaps surpsiringly- including the major cities of the US have more man than women in the age group of 18 to 40. (that's a real demographic crisis, no matter what others say)
In the other words, most women in their 30s may still feel they have plenty of men to choose from - which , of course, that both parties would be happy in those relationship but I guess that's a subject to a different thread.
Yes, I've written ad nauseum about this, and I've also looked at recent maps of singles, singles ages 18-24, 25-36, etc. Then I selected for non-obese and you will laugh hysterically about the situation, at least in the USA. There's only like 5 cities in the entire USA that have more single women than men, forget body habitus for a second. It's like a random city or two in South Carolina, one in Alabama, one in Louisiana, and perhaps one in Tennessee.
There's always a plethora of reasons, but you do mention a good one that is a nuance of the point I constantly hammer: selection pressure on women. The modern world has lost it almost entirely. Yes, with a lot of men, they can "wait." With jobs and a "career" they believe they can wait. With government aiding them, they think they can afford to wait. But they forgot about biology and what men desire, or don't want to admit it, since they are too busy eating and drinking too much. Fix the sex ratio and almost all the rest falls in line. Sadly, that mostly comes in periods of war/economic damage. Notice that affluence leads to all of the other problems, which only happen in careless, unbelieving societies.