Fair enough. But that shows that there could be the same thing here on earth.
Your question presumes that the suffering of an innocent serves no purpose.
I disagree with that statement, but it does lead to some questions.
What purpose does it serve to have innocent suffer without anyone knowing of the suffering?
What purpose does it serve to create a life that ends without anyone knowing it even exists? (More than half of conceived eggs are passed from the mother's body.)
I would argue that the suffering of an innocent draws us to God in order to right the wrongs, and the evils of this world.
Why did God wait until a couple thousand years ago before sending His Son to earth? What about the people before then?
Why is there a wait of thousands of years before the Second Coming?
Well from what we can see he sent his people Moses.