It's so weird that people have this as some sort of epiphany, rather than it just being the default way of thinking. I would never have kids unless I:
Was financially comfortable. Not just stable but actually comfortable.
Was completely mentally stable.
Felt like I had learnt enough about life in general and child psychology/behaviour to raise a child without giving them complexes.
Was willing to essentially give up on any unfinished goals of my own in order to focus on ensuring my child has a happy and fulfilling life.
How can you ethically force consciousness into existence unless you meet all those requirements? And even then there's plenty of chances for something to go wrong. I was raised pretty well, nothing majorly negative happened,, but I was still depressed for the majority of my life so far.