There are several reasons people choose to avoid gluten. They are not always as the result of a diagnosed illness and this can cause some general scepticism about people who need to be gluten free which can be very unhelpful.
My husband has coeliac disease. It is an auto immune condition which in his case will be triggered by a single crumb of bread with gluten or by eating something fried in oil which has been used previously for frying something breaded. We have to be extremely careful as an attack causes severe symptoms for at least 24 hours and every attack causes small long term damage.
BA’s gluten free meals (when they remember to load them) have never caused him a problem. They are, however, shockingly dull and the gluten free bread roll could be used as an offensive weapon. They also seem to conflate it with a dairy allergy so he never gets real butter or cheese. He’s happy to be safe though and always carries his own snacks in case the meal is not loaded or is not to his liking.
Could BA do this better? Yes, but he’s mostly happy to not be ill! On the other hand we were not impressed with their sorry but not sorry when they failed to load his meal.