Does anyone ever notice how "luck" also happens when it does absolutely NOTHING to the game's status? I mean sure everyone notices when an attack lands four hits and then the defender either makes or misses all of his rolls but do we ever pay attention when an attack misses with all (or at least most) of its dice (even after all modifiers) but then the defender rolls a perfect defense which does no good?
We are conditioned to notice the "dramatic" die results but often ignore any other cases of "luck" when it didn't really matter. Rolling perfect defense against an attack that misses, rolling damage in excess of what the target can possibly avoid and/or absorb, and other things happen where the luck involved doesn't mean a thing.