I dont really have a dog in this fight but what exactly is the knowledge they're limited on? That "could it be possible" shyt is gonna get swatted down. You could say that about anything.So we know the argument. Its suffering and evil in this world. A good God wouldn't allow that. Therefore God doesn't exist.
But let me ask a different question. Are you open to being agnostic about the point of suffering. You assume that since you can't see the point, therefore there can't be a point. Hypothetically, is it possible that there could be a point of suffering but you can't discern it? It's more that your knowledge is limited?