It's the best of both worlds...DINKing through early career, getting set up, and getting a kid once established and settled in a career. Bonus points for not having to deal with all the baby stuff and still getting the most fun years (I'd say like 2.5 through puberty), and not pausing career development for establishing a family (which especially handicaps mothers)

Our bodies rush us into wanting to have kids young. But our society is making that increasingly difficult.

Say what you will about kids, I can understand an individual not wanting a kid. That's a personal choice.

But the recent trend in rapidly declining birthrates? That's a societal level issue.

Reproducing is literally the purpose of life. That's all. You gotta be fucking up the balance real bad to turn that off for a significant chunk of the population.