If you were maximally powerful, maximally knowledgeable, perfectly moral and maximally good, how would you have created a world that is better than this one? I would have created a world with no cancer, no alzheimers and no parkinsonis. Imagine the exact same world as this one but without the 3 diseases I mentioned. Wouldn't it be a better world than the actual one, with less pain and suffering? Wouldn't you choose this world over the actual one?