I am not sure what to make about the increasing amount of people with a real or an imagined gluten intolerance. By imagined, I mean someone that has a generally unhealthy diet, for them to not see the doctor, but decide for themselves that wheat is the enemy, rather than the garbage they have in their sandwich, in their burger or on their pizza.
Bread is getting a bad name, yet whole civilisations have been founded on it. This bad name is coming along at a time when most of what most people eat is 'processed food' rather than 'real food'.
I brought my own bread making 'in house' with a bread making machine and I have not looked back. Not so much as a slice goes in the bin and the machine is on 2-3 times a week. I have no incentive to pay more for bread laced with preservatives that does not taste quite as good. I have just the four ingredients, well, I add a spot of olive oil too, to keep it soft, but you get the idea. I don't add any extract of human hair into it, or any propionic acid as a preservative. There are no 'processing aids' that don't appear on the ingredients list.
I hear you regarding restrictive diets, however, I did restrict my diet to cut out all of the processed foods and to always cook from scratch. I buy mostly vegetables and fruit. Those aisles of frozen things or things in bright packaging are of no interest to me. I have just chosen the good stuff, and changed my ideas on what that might be.
This was just done on a whim, to see if I could last a whole week without chocolate, sticky toffee puddings, ready made pizza and all those good things. I did not expect to feel so much better in such a short period of time, so I decided to go for a month, which was easy, and, after that, the pattern was set.
I had always considered a certain amount of bloating, poorly formed movements and the rest of it as normal. Oh, how wrong I was! I have not had the slightest problem since my 'nutrition experiment' started and a fully working digestive tract is such a pleasant life upgrade. It is not something one brags about, 'having perfectly working bowels', but there is no way I would go back to eating processed food garbage.
The only downsides are no farts that smell (always odourless is weird), and no time spent doom-scrolling 'on the throne' (visits to the restroom are all too brief to need a book or a phone).
In my opinion we have over-complicated the deal with our microbes. We do this to get to a stage where people avoid fibre at all costs or become fearful of bread. From my n of 1 experience, wonderful things happen if eating just real food, as in mostly vegetables. I don't think there is anything wrong with sugar, all I know is that I can live life without it, and prefer having good teeth. It is the same with fats, clearly some are bad, but, from fairly natural sources, all is fine. Palm oil is ubiquitous in processed foods, and there is nothing wrong with it, but I don't have any in my food and see no reason to seek out processed foods that have it.
I count the half hour I spend in the kitchen as 'physical activity' and ring-fence that time much like how some people go to the gym. I know it is low intensity and not a 'workout', but, once I get off the sofa and into the kitchen, I enjoy preparing vegetables and cooking. I also enjoy the money saved. My 'superfoods' are things like potato and carrot. The only supplements I take are vitamin B12 and vitamin D. I also get to eat more, which is due to calories. Junk food is calorie rich, and, if you are eating mostly vegetables, then you have to eat to satiety, which needs a bit of stomach training.
I don't believe everything can be magically fixed by eating mostly fresh-cooked vegetables. Yeast infections and the like need some prescription medications to resolve, but, once done, there is a new normal of a perfectly working digestive tract, perfect blood pressure, a BMI at the lower end and skin that never gets so much as a pimple.
Give a 'restrictive diet' of just real food a go for a week, make some mistakes along the way, and learn what works for you.