"Gluten free" doesn't equate to no gluten..Rather the semantics this meaning relates to is if the food contains 20 parts per million or less..
Additionally, there is also real possibility of cross contamination during the manufacturing process.
https://www.coeliac.org.uk/gluten-free-diet-and-lifestyle/food-shopping/law-on-gluten-free/
I have a niece who is a coeliac, she has adopted a gluten free/processed carbs free diet - best course of action IMO, as even 'crumbs' of gluten can lead to small intestine damage.
Yes I know, I have friends with it. Providing you buy the genuine gluten free stuff there is no issue. I don't understand what you are trying to say tbh. It isn't like it used to be, the genuine articles are found all over the place now.