It's actually pretty simple. People are too busy to think about stuff they aren't directly interested in. Pressure to have kids is reducing year by year (rela

It's actually pretty simple. People are too busy to think about stuff they aren't directly interested in. Pressure to have kids is reducing year by year (relatively, and it compounds quickly). Since everybody is being trained to pursue personal excellence/satiety they're pushing back everything that isn't directly in their interests. This includes devaluation of relationships (romantic, parental, and platonic). In exchange for the elevation of the individual. And so, when the question of kids comes up, it's done with the same myopic lens as most other decisions. Which isn't to say, that its easy to just have children. But, people aren't exactly kicking their feet up. They're busy; very very busy. This is actually probably no different than before, but there was momentum from traditions and peer pressure. But because the rails have diverged for so long, the curve is compounding.