I personally think that one of the best reasons to use RQ rules is when you want the rules as the game oracle, i.e. what they say happens, is what happens. For instance, I make all my GM rolls in public, just to dispel the idea that I might be fudging them to save the characters. When they're in a fight, the dice get cast. In this kind of situation, it's a real problem if the rules don't do what they're supposed to, and "oh, just MGF it" isn't really helpful. I'm trying to achieve MGF through a fairly mechanical and player-understood oracle, not by constantly ruling by GM Fiat. In this case, it isn't MGF to just fudge the rules.