You could save a man from drowning and be robbed by him afterward. This is one of the harsh realities of life. It does not mean that we should let others drown. We just need to accept that doing the right thing can result in wrongs. Black Sabbath’s Iron Man (1970) tells a story about a hero who becomes a villain after realizing how unfair life can be. I imagine that it is the fictionalized fate of countless individuals. Do not allow yourself to become one of them.