I follow your reasoning.
I reject your premise, though.
I do NOT believe that G*D is all powerful, (though I do believe in G*D, personally). I struggled with this question for a long time. Rabbi Harold Kushner wrote of hisown struggle in
When Bad Things Happen to Good People, the book I recommended earlier.
In it, Kushner rejects the all powerful G*D too. He shared his own story about his boy, who died from a very rare disease that causes children to die from old age.
Here's a review of the book:
Rarely does a book come along that tackles a perennially difficult human issue with such clarity and intelligence. Harold Kushner, a Jewish rabbi facing his own child's fatal illness, deftly guides us through the inadequacies of the traditional answers to the problem of evil, then provides a uniquely practical and compassionate answer that has appealed to millions of readers across all religious creeds. Remarkable for its intensely relevant real-life examples and its fluid prose, this book cannot go unread by anyone who has ever been troubled by the question, "Why me?"
G*D grieves with you and I over that little girl.
And all the others who suffer needlessly.
G*D gives us the strength to continue on.
I strongly recommend this book to those of us who have these questions.
(And who among us does not?)
Shalom!