Is that like the obsession over different sources of sugar? Many people in my circle treat cane sugar as if it had magical properties of not being sugar at all :-/
The worst is salt because iodine deficiency actually isn't that rare and is increasing.... The cheapest generic salts tend to have added iodine but most of the "fancy" stuff doesn't.
I think it's different. I think most people don't even realize it's in there. They just see "celery juice" or "sea salt extracts" and figure it's for flavor.