You know me: I play a warlock spec that starts with a 'D' only over several dozen copies of my cold, dead body. I'm diehard affliction whether the spec is on top or not. But that doesn't mean I don't ever pay attention to the DPS simulations. I just think the vocal playerbase hedges their bets a little too much on what comes out of the BiS heroic simulations.
Fortunately for me, Ghostcrawler also feels players put too much emphasis on SimulationCraft when it comes to spec balance in PvE. Does this mean SimulationCraft is not valuable? No, it just means that players should be more aware of what's going into a particular simulation and how to interpret whatever data comes out.