Comment by didibus

I think generally people are optimizing for health outcome and longevity, not peak athletic performance at your prime age.

But also, I've seen people often assume vegetarian or vegan diets are "healthy". But many people in India for example will still eat a lot of refined carbs, added sugars, fat heavy deep fried foods, large volumes of ghee or seed oils, etc. And total avoidance of animal products can also mean you have some deficiencies in nutrients that can be hard to obtain otherwise.

A plant-forward diet is more specific, like the Mediterranean diet, which itself isn't at all how your average Mediterranean person eats haha. But it involves no processed foods, no added sugar or excessive sugar, diverse set of nutrients by eating a balance of veggies, legumes, nuts, seeds, meats, dairy, fish, and so on all in appropriate proportions, as well as keeping overall caloric intake relatively low.

It's quite hard to eat that way to be honest haha.