This was a post to write only if you have incredibly thick skin. I've heard the debate about future "culture" wars where one culture is eaten up by another, and also all the arguments thrown at people with no kids, for whatever reason they don't have them. Britain has a horrible child support system which literally traps any woman who isn't of steady wealth at home and rather miserable economically. The US isn't very good either, but often presents more varied work opportunities at least. These are all factors that any woman should at least think about, I agree with you, because if you're a woman without a man with a decent job, or unmarried even, it will risk to ruin you, and possibly your child. The world is full of poor and broken families - and in a *societal* context that might not matter, because it may still keep the wheel spinning, but on a personal matter, in what some believe to be the only life you get, it does matter a lot. Being scared economically for having a child is real, and people that act astonished and accuse others of selfishness and worse are hypocrites, because whether they had money or not when they had their kids, there were probably factors that made them still able to make that choice (unless it wasn't a choice, in which case it doesn't apply to this post).
There are *So* many broken families in the world, so many people who didn't think things through and so many kids hurting.

Having children can be hard, it can be wonderful and it can be dreadful, but to have a child is never a decision made out of socio-economics, it is every bit as selfish as not having one, just in other ways. And in the old discussion about selfishness, children and a structure which promote better living standards for child families (which I believe is what you wanted to discuss), some people with children *need* to pump up their own importance as "breeders", for reasons just as emotional as some people who can't have kids have for painting up large families as a poor choice.
And in this discussion about breeders and non breeders there should in fairness be a factor about what all the broken families of the world cost society, any kind of society with a structure that's somewhat stable.

Personally, I don't think "breeding numbers" and culture wars are interesting or important discussions, particularly if some form of "ethics" or socio-economy is involved, because they are so disingenuous. On a personal level, having children is never about that, but is sometimes made into that as a fake argument in a discussion.
Easing up the mobility within Europe even more (it's going in the right direction) and discussing a system with more support for families, would be far more interesting (and challenging) topics.