Benefit of having multiple children: parents definitely will not commit suicide for losing one kid. There are still more left that need care. So did Sleepy Joe. People had to get over it for the rest of the family. If the only child is gone, omg, some people just can't get over it. Sometime it is about getting over the tragedies and move on. There's always bad time such as war, famine, untimely death.
