I have read quite a bit about the gluten free diet, although I realize you are discussing a wheat-free diet here, which is not the same as gluten free. I thought that gluten might be causing problems for me and leading me to be tired for no real reason. I even got blood testing for celiac disease, which came back inconclusive. I went on a gluten-free diet to see how it would go, and the results of that have been inconclusive as well.
However, what I wanted to say is that, if you have a problem with wheat, unfortunately you cannot eat it. But I would not go so far as to say that we should all cut wheat out of our diets. I think that whole wheat is healthy food, especially for those who already choose to eliminate other food items because of the diseases they may contain.
I make my own bread, but it is not appetizing in the way that wheat bread is. Also, I will confess that to get my bread to hold together, I use eggs, apple cider vinegar, 1/2 cup cornstarch per loaf, and guar gum. It may be that I could do better and do not know it. However, it might be good, if one is contemplating a gluten-free diet, to look into some of the recipes. Gluten-free does not mean it is actually healthier than wheat. I have to avoid barley, rye, and commercial oats as well as wheat, to be on a truly gluten-free diet, so I use flours from soy, buckwheat, brown rice, and corn. However, the "glue" (gluten) from the wheat is missing.
Again, please do not think I'm advocating unhealthy articles, but I am saying that in my own opinion, whole wheat bread can be a healthy food, and I personally wouldn't recommend that all need to give up wheat. However, if the doctor in this book thinks that rye, spelt, kamut, barley, etc. are OK then that would likely make his diet easier to carry out than a gluten-free one.