I believe.
A lot of people will throw the "children suffer and did nothing wrong" and yes this is a terrible thing, people often don't look further. A child may die of bone cancer today, and cause someone or something else to happen to cause even more good.
I understand that not every death leads to something good or better, but even the simple fact that death allows for more life because the planet can only handle so many people and more are being born than there are dying.
That's just my thoughts though