It’s not just people with Celiac who eat gluten free... Individuals with various GERD issues, and other gastro illnesses do well following a FODMAP diet... Gluten is just one of the many foods that are not well tolerated.
There are also people who have wheat allergies.. but do not have Celiac.
Intolerance to foods can also develop in some individuals from over consumption.. it is true that most of us eat a less varied diet than we should. Wheat derived products just happen to be the most common carb staple, many of us eat it multiple times a day.
My grandfather died at 42, one uncle at 49 and another at 39. I have celiac’s and it is hereditary. This crap about jsut showing up is just that crap. Celiac’s has a long history and most was never known till just after WWII. It was found that wheat caused it because of wheat shortages in Europe during the war. After the war when wheat became available again the problems started again. Just recently they came out with a blood test to test for it. That is why you see more cases now than in the past. Till recently most doctors had no clue or thought the symptoms would go away. That was true till you died like my uncles and grandfather from ongoing complications. I love bread and just about everything made from wheat barley or rye and still I went cold after diagnosed with celiac’s. If you have cieliac’s you know what it does and you would not think it is a joke.