you seem to be working with extremes here.
If the room isn't pitch black, then it must be white bright. That isn't always the case. A lack of cause does not mean chance alone. No universal moral code does not mean that we can't have reasons for stopping Hitler
You seem to be suggesting that if there isn't everything then there is nothing. Why can't there be a middle position? That there is something, its not nothing, but it isn't everything.