An intriguing and subtle thesis. You attempted to shift our perspective of evil from moral to natural. Consequently, you argue that natural evil takes precedence, or at least some significance in moral philosophy. I've never thought of it that way.
Your argument is important if we're discussing the problem of evil from a theological point of view. Would you say that it takes on an equal, or any, significance beyond the theological?
That is, I wish to know if your claim could impact moral philosophers who do not deal with theological ethics.