Honestly, I find certain topics, like the need to procreate, are impossible to reason for or against; I might as well be handing out Bible copies. But, an obvious argument for procreation is an aging population, coupled with swelling national debt largely affected by the need to take care of them and a decrease in youth which can produce products to reduce this debt. I have not seen any intellectually honest way of dealing with this beyond “automation will solve everything”. That’s just one example, anyway.

Secondly, I don’t think your data on single parent families really disproves anything, specifically because that data is highly confounded by drug addicts, high school dropouts, unwed couples, accidental pregnancies, and dozens of other factors. If we’re to reason in good faith, the advice I and others are advocating for is that you don’t need to be a homeowner with a 200k+ salary, although of course you should be a reasonably mature, employed adult with a mature partner.

I think it’s in poor faith as well to reduce this to “if you feel a need to have children, you’re irrational and still stuck in go-forth-and-multiply mode”. But, again, this is not an issue anyone can find common ground over with reason or data (which you can find to support any conclusion), and I expect the HN crowd falls on a particular side of this on average, so I won’t argue further.