I mean that's just as bad faith of an argument as a Christian saying "it's God's will." You can't argue against nonsense and illogical concepts because they will hit you with more nonsense. But if an argument can be made logically, that's when it is time to meet it with more logic. If evil exists, and is also not a creation, but a facet of life, then to remove all opportunity to choose evil, destroys the idea of free will. Turn the argument on its head. "If God were all powerful, he could create a world with free will and also no good." That doesn't even make sense. If there is no good there is no evil. There is no longer a choice in the matter.

At that point you have to think about things like free will and good and evil as what they are, human inventions of the mind. I know people of faith who understand the difference between inventions of man and what they believe are creations of God. It's silly to say God invented the car I drive. It's also silly to say God invented math or philosophy or science. Only the real fanatical types will argue that way. Instead most people, when they boil it down, will come to understand good and evil are human ideas. For the faithful, I think the smart ones will be able to determine that if we invented those ideas, they don't exist because God made them exist, but because humans chose to invent them with their free will.

I think I'm going to stop defending the Christians now lol. They are capable of their own arguments. As bad as they usually are...