She may theoretically birth another child but there's a substantial risk.
There are "physical aspects", just because it's all theoretical and principles to you doesn't make them go away.
So on HN, that’s the 70s through the 90s.
Since then maternal mortality in the USA has only increased. The reasons vary, but this still supports your comment as less people ought to be willing to risk having more children.
I would add, that this stat also pairs with the prevalence of hard pregnancies in the USA, so people may become more protective of their children since they suffered more to have them.
Other countries don’t have this issue, and also have more free range child allowances (e.g. Japan with low mortality, low number of children, but highly independent children supported and watched by adults in general and not their parents).
That is part of the genius. They hide the data then declare "just show us the data" knowing damn well they hid it then try to hide under just being reasonable and why can't you prove it. It's quite sadistic actually and of course arguments such as yours play into this intentional subterfuge. Note that this hiding of evidence, when done by private actors, in a court of law usually means it is entered in evidence in favor of the other side as hiding means the worst case scenario of that is contributed towards the burden of proof ("spoliation of evidence.") You don't get to play the fuck-fuck game of simply asking for additional burden of proof when you've intentionally induced spoliation of the evidence.