I used to make fun of my niece for being gluten free and called it part of the bullshit fad. Then her migraines and constant malaise went away. I'm thinking there's some middle ground there between celiac and bullshit, although I'm not convinced it's not something else in the wheat besides gluten that's doing it.
It's possible.
Celiac is (fairly) rare clinically , so I react the same way you do when I hear the average person obsess over gluten.
Migraines are tricky though. There are certain trigger foods and many involve sulfites and histamines.