Food is expensive for a large family with a decent mortgage payment. Also, Remember when you have a family your career mobility drops dramatically. I know I won't have kids until I am 30, without going into debt of course.
Minimally feed one? Yes. Feed, clothe and care for them "properly", so that measures of their total health (like for example, their height) wind up in strong greater-than-or-equal correlation with parents who are already decently-off? Takes a bunch of effort.
I think we're saying the same thing except that you believe it's more expensive to make sure kids have shoes and aren't stunted than I do.