Even in rich countries, properly equipped children can provide resources that are worth millions if not more. You can't buy the loyalty that a child would have, and a tribe of highly educated, resourceful children is quite a force to have in your old age.
In my experience, the families that had 3 to 5 children, where at least 2 or 3 of them supported each other went far further than others. They save money by being each other's insurance, are able to share resources and knowledge, help each other in rearing their own set of children, and the implicit trust is something that can't be bought.
Of course, it can all go sideways too, but that's applicable in any situation. But the upside is huge.
In my experience, the families that had 3 to 5 children, where at least 2 or 3 of them supported each other went far further than others. They save money by being each other's insurance, are able to share resources and knowledge, help each other in rearing their own set of children, and the implicit trust is something that can't be bought.
Of course, it can all go sideways too, but that's applicable in any situation. But the upside is huge.