I personally think there should be more emphasis on safety and mechanics of shooting than forcing a specific stance/method of shooting. Here is a great example: I have a friend that can shoot better offhand with his 454 than he can in any other stance. He hits pie plates at 200 yards in this method. Seems like it works for him…
In my years of shooting, I have realized one simple fact about shooting: What works for some will possibly work for others, but each MUST adopt their own shooting methods based upon mechanics of both the science of shooting and how their specific body works. People can use a baseline, generic method by all means. There has to be some adaptation and modification to these methods based upon what works best for that individual, though. If not you are doing nothing more than putting a square peg into a round hole, then painting to match.