“Why does God allow it?” was a frequent objection when we used to do house to house ministry . I can remember it as far back as the Aberfan disaster when I was still a youngster.
The stock Witness answer is to say that God expects mankind to look after himself and he is not there to protect us from ur own mistakes and ignorance since man chose a course of rebellion against him. If he protected us from the consequences we would have no reason to be careful. It would also help maintain the rotten sinful life we have today.Rather , his purpose provides a permanent solution to sin and death.
Nowadays I can see the holes in that argument and I know why nobody believed me. Truth is I cannot answer the question…
Mind you that answer is better than saying, as some vicars do, that God must have wanted another angel in heaven and took the child !