I understand your concern, but in my experience this has not been the case. Many times I have been asked, “Allergy or Preference” and the level of care changes depending on the answer.

In my case my daughter has diagnosed celiac and we eat out quite a bit. The number of dietary options both out at restaurants as well as at the supermarket, the general level of education around what even is gluten, I believe has greatly benefited from non-celiac positive people preferring gluten-free food (for whatever cockamamie reason they may have).

If it was not a dietary trend I don’t think we would have nearly the number of options, and certainly not entire gluten free menus at restaurants available to choose from.