>>510497403 (OP)All the kids leave and invariable have fewer children and move further away, rarely visiting the elders, now there is only two old people left mentally, physically, and financially exhausted from raising children only to end up old and broken. Instead of catering to their own health and happiness in their youth and not weighed down by children to live a long healthy life, they instead die in pain together.
No where, or very rarely, in nature do the parents (that raise offspring) live better with offspring than those without. Many end up dead because of their effort to raise offspring. Humans are really no different.