Good for them! Too many Yuppie couples who could easily afford kids don’t have ‘em—or just have one “trophy” child. Someone has to take up the slack.
Let's be thankful for that.
Or, maybe, some people like to show a little restraint in their breeding.
I could make arguments about people who show no restraint or forethought in procreation, and saddle us all with the burden.
If a person doesn’t want kids, or only wants one, what’s it to you?