Yes it's true salt is salt and it's tha same attitude i alwas had. But you know how some people with allergies can only eat organic foods? Why is that? The authorities will tell you the food in it's basic structure is identicall, and while it may techinically be, there's more to the puzzle then meets the eye. Until very recently we did not understand the differeces in fats and all were grouped into just fats. But we've certainly seen a dramatic turn around in this attitude. I have observed natural mineral salt to make a nigh and day difference on my body. And i shifted back and forth with the same consistent result.
I'll give you an example. I always ate tuna fish from the can (albacore). The problem for was it always bloated me the next day, over and over, no matter how much i rinsed it. So then i switched to low sodium or no salt added and replaced the salt with mineral salt and never got bloat the next day again, why is that? I think our nutritional science is good but there's still plenty of stuff we don't understand.