Exactly. It took me a long time to piece together that modern wheat was making me sick. I don't think I ever would have if I hadn't been so intrigued by the gluten free diet trend and started researching it. I am able to eat whole grain spelt without problems.
Wild varieties of wheat doesn't have nearly as much gluten, and the higher concentration results in a lot more children (myself being one of them) reacting to the protein with an immune disorder(celiac disease).
So you can't just say "sugar bad, flour good" as if it was a binary decision. Everything has consequences on different levels.