In psychology of video games, Jaime related how framing works out in WoW and in business. I discussed Framing in the review of the Art of Critical Decision Making. Anyway, its a great skill and technique. Its actually the difference between being happy or content more often. Its not lying by the way, its making overcoming disadvantageous cognitive dissonance.
GMs and Players who lead have to learn this skill, when they want people to focus on what they should do and not get distracted by setbacks. Even if you are aware of it, how much more difficult things will be if people dwell on the negative and failed to be adaptable and take advantage of the opportunities the situation presented is still an objectively powerful advantage.
It is also habit you get when ever Min/Max habitually but have the confidence to take on challenges.