For most people throughout history, having family has been the most significant and meaningful thing. DINK/SINK sound "easier" but hardly "more fulfilling" that a life of family and the steady of stream of "oh shit, I waited to have kids and now it's too late and I am depressed" suggests that it's not the ticket to a good life that it might appear at the onset.
Historically speaking you are probably correct, but we live in the present. I've been thinking about this a bit since I recently caught up with a childhood friend. He's a laborer who trims trees for a living and mentioned that he'd been with his girlfriend for a decade and they had never had an accident. Interesting turn of phrase, isn't that? Accident? Yet you know exactly what he means.
The research on this suggests that you've got it the other way around actually on who ends up with lower levels of emotional well being.
> The recent proliferation of studies examining cross-national variation in the association between parenthood and happiness reveal accumulating evidence of lower levels of happiness among parents than nonparents in most advanced industrialized societies.
