I don't understand why people think being able to eat gluten is a binary thing. Case in point: My wife can technically eat gluten, but doesn't. She started hav

I don't understand why people think being able to eat gluten is a binary thing. Case in point: My wife can technically eat gluten, but doesn't. She started having stomach/digestion issues 6 years ago, and we have spent thousands on medical tests. Her doctor asked her to try cutting out gluten (even though she isn't celiac) and it turned out that it helped. She still has problems but when she eats something with gluten in it, it is worse. So not celiac, but still can't have gluten because it makes her feel sick. Why do people find this hard to believe? There are many levels of intolerance to something. We don't mock the lactose intolerant even though some could eat icecream if they wanted.