This makes sense. We tend to think of wheat as being a wholesome natural food source, but modern wheat is far from that. It's genetically engineered and drenched in herbicide far beyond its original easily digested form.
Even in ancient times, wheat products and bread have always been cheap "filler" foods. It's calories, easy to store and transport, will keep you alive, and most people tolerate it well, but it's not really healthy food.