I’m pretty sure the retort was aimed at the patronizing bit here:
> but ignores the tough question of the individual responsibility not to have more children than one can afford.
Which seems quite relevant. The only fool-proof plan for anyone is to have zero kids, which is ridiculous.
My wife and I live beneath ours means, save as much as possible, live debt free, and we instead try to afford as much as possible for the kids.
A job loss or major accident/medical problem where we survive is terrifying from a financial PoV.