I'm pretty much of the same mind. Every trainer with sexy sleeve tatts and a neck beard, or aviator glasses and a ball cap if it were the 80's, has their own snake oil they're trying to sell. As has been pointed out, tunnel vision may indeed limit the value of such concerns. In the end, putting the rounds where they count is the entire point. No violent encounter I've ever had went according to plan. Unarmed encounters generally wound up being an old fashioned back alley ass whupping, regardless of techniques trained up on. Guns out scenarios seldom started with a classic weaver or isosceles stance. However, there are good, better and best ways of doing anything. Consequently, we should train to the highest standard available to us, in the attempt to minimize our personal fuck ups. As the man said, "Everyone has a plan until they get punched in the face." Still, having a plan is always a good idea.