Disagree - our, as a studio, fundemental beliefs, is that the game experience should be believable - i.e. if you guess what the outcome should be based on real life experiences, the game should match that outcome.
This is however sometimes used to justify some decisions that are negative, but is applicable to positive ones as well.
For instance, the rate of fire on the minigun is unbelievable - why would you need multiple barrels to handle such low rof? (But then again, technical limitations)