I'll say it again, if you do it correctly, you shouldn't be wasting any meat, ever. I can't speak for everyone, but I can speak to the ones I have done.
We both know that the gutless method wouldn't be practical for a butcher to use. Animals are much easier to deal with when they are hung and skin. Unfortunately, when you are 5-10 miles from your camp or vehicle and the terrain is rough, it is not very smart to try and drag your animal out, therefore the gutless method is what we use. Some are good at it and no meat is wasted, others rush it and yes I am sure people miss some of the meat.