There actually is a right way to hold a gun. There actually are better holsters and better sighting systems. There are outliers in anything. But there are ways to stand and hold a gun and look at a gun and handle a gun that work for 99.9% of the population, barring some bizarre physical deformity or disability.
A good instructor doesn't walk up to each student wondering what will work for them, because "do what works for you". A good instructor wastes his life away figuring out what's best so his students can skip to (near) the top of the mountain he had to climb without all that effort and heartache.
I've trained with some of the objectively best shooters on the planet and when it comes to how to stand, hold the gun, what sights to put on the gun, and how to look at those sights, they all agree. And it's not just wrong, it's irresponsible to tell Billy Bob from down the street that whatever crazy thing he came up is likely as good as what the best on the planet are doing.
