A person could also use this kind of thinking to shrug off something they did that was very wrong -- something they should regret. Often enough guilt is the only real consequence that would bring a person forward to answer for a crime they could manage to conceal (be it an ethical, moral, or legal crime).
"So I was drunk and killed a kid in a hit and run. No one saw it happen. I can pull a headlight, bumper and quarter panel off a junker. Get the paint matched and we're good as new. If anyone asks, I hit a deer. Meh, it happens."
Regret plays a crucial role in the mind of any decent person.