Well, this diet seems to work for me and many others. Given the variety in our own genome, results may vary, of course.
I don’t think our genome has much of an effect on what a healthy diet is for any specific person. I actually think most of that is cultural—the foods you are given as a baby more or less set the stage for what is healthy for you later on. That is because the foods feed the microbiome (your gut microorganisms), and the microbiome influences your food choices and impacts your health.
In some extreme cases, probably, the genome does have an effect, but that is where living conditions limit the diet and people had to adapt (that is, they underwent natural selection) to better survive the austere diet. For example, I think that Eskimos have different ratios of digestive enzymes to deal with their diet of fat and meat. Most of us would not do well on such a diet.