Mike,
I agree with you, in principle, but the real question is what does fit mean?
This topic has been hashed, over and over and, my take away based on what I have read is this: the fit for field shooting is different from that used for clay games (essentially, low gun vs high or pre-mounted gun). Most of the coaching I have received at skeet suggested that I needed to get my head down. Ok, that suggests that I am not shooting enough drop. Ok, so that may help to explain why I can pick up my 16 ga Parker, with it's 3-1/2" drop and make hay in the woods and on the skeet field.
My personal opinion is that too much time is spent talking about gun fit when it comes to the average shooter, especially one who is primarily a hunter. What fits? Depends on time of year( how much clothing you are wearing) type of game (long open shots at phez) vs snap shooting at early season grouse and age (unfortunately, most of our bodies go through significant changes as we age or as we lose weight).
I have a close friend who spent $$$ getting a new shotgun built to "fit" him - lop is pushing every bit of 15". Shooting skeet with a mounted gun he almost always out shoots me. But the guy can't hit a grouse unless it is sitting in a tree. He misses all but the easiest of shots. I have spent years hunting with him and I think his problem is that his gun does not "fit" him for hunting situations where relying on instincts is critical.
I am not a pro and I am sure that there are a number of people who will take exception to the statements I have said, but I believe that there is no substitute for practicing with a gun and a fitted gun is no substitute for practice.
