Like… I don’t know what’s the point. Eat heathy, and live a long life? Jesus christ, who has the energy for that?
Just eat whatever. Drink Sodas. Die. Who cares. There’s probably gonna be a global recession, or global great depression. Everyone around me is toxic. People in my country is toxic. The government is toxic. Why even live that long? Maybe my next incarnation will be better.
There are also plenty of reasons “healthy” foods might absolutely fuck with your health, even if you’re not eating a ridiculous amount of them. For example whole wheat is a perfectly fine food to have in your diet, unless you have celiac disease and don’t realize it yet.
Yes, allergies and rare conditions are a thing sometimes. In your own example that doesn’t change the principle that whole grains are still the cornerstone of even this hypothetical person’s diet - they just have to avoid gluten.