I would also argue that plenty of people that go for children who are not ready for it don't make it just fine. More importantly, their children, that didn't ask for any of it, end up suffering because of their mistakes. Plenty of people have psychological issues of various degrees because of poor parenting. 15% of families in the UK are lone parent families! By age 12 a staggering 40% (!) of children are not living with both birth parents! [1] And these figures are almost twice as bad for low-income families. And out of the children that do live with both birth parents, 11-28% of the parents report an unhappy relationship. That is the catastrophe.
Humans have this strange blindspot where they tend to be irrational and irresponsible about the decision to procreate. Previous generations did not have much of a choice because of lack of available contraception, lack of knowledge. Our generation has no excuse.
[1] https://assets.publishing.service.gov.uk/government/uploads/...