If you read the article, that group is subsistence gatherers, basically trying to find enough calories daily to survive.
A very different situation than pondering one's bloodline.
it was a blessing because you had more help. Children could work the farm, help hunt, household chores, etc. When you're a subsistence farmer, getting more help is critical to feeding the family.
Now, children can't be brought to the worksite or office, so the blessing is less helpful.
Most people in antiquity saw children as a blessing. The more children you had, the larger your bloodline would be. In fact, being unable to have children was a point of shame for a woman. It wasn’t until the rise of the modern era in the west that people started wanting small families or no children at all.
You can still see this idea of children as a blessing present in some communities that haven’t been westernized, e.g. some Mohawk communities in Canada.