All of this means that the real world is quite complicated, and does not fully reflect any of the "moral positions" that philosophers like to talk about.

That is doubtlessly true, though I wonder if its an entirely fair criterion. While most ethicists would agree that the right view should reflect actual everyday moral judgements, nothing in particular holds them to that. It's simply possible that no one is presently good, and that the everyday moral judgement people make are terribly corrupt and over-complicated compared to the correct judgements.