Had a friend ask me to retouch an old portrait of his parents this weekend. Spent about an half-hour on it while watching a movie. Took out dust and scratches, re-shaped the light, removed the clutter, and corrected the color. Ta-da!
If the photog was doing his job he would have set the camera to be properly exposed for the environment. All the monkey would need to do, then, is press the button. I assume that there were probably 100 more misfires for these 2 actually usable portraits.