I did the diet it for 5 years after searching long and hard for the reason why I felt sick all the time. Blood tests and biopsy (though after I had stopped eating gluten) came back negative, but I was convinced there was still something to it. The doctors said "well if you feel better, just don't eat it." I ended up still having the same stomach issues as before, but instead of saying "oh maybe it wasn't gluten" I just removed more types of foods. It seems like dairy was the primary thing I have digestive issues with, since trialing re-adding gluten to my diet early last year did not cause the stomach issues I had previously attributed to it. I finally decided to test eating gluten again when there were a barrage of scientific studies saying non-Celiac sensitivity probably didn't exist. I think it initially helped me so much because I ate a lot of pizza and mac and cheese, which are high dairy and generally not easy to digest at all. Why didn't I realize my stomach issues were due to stress and poor diet? Wish I could say, guess I was just not thinking clearly about it.
Gave me a lot of dietary paranoia and stress following that diet... I definitely feel for Celiacs who have to do it, but I am glad to not be doing it anymore. Made me more of a social recluse as I had nervousness about going out and not being able to eat/drink things. My anxiety got worse. Guess I am a bit of a hypochondriac and I have jumped to a lot of conclusions regarding conditions I might have. I have diagnosed GERD/IBS and probably some dairy sensitivity.