What benefits does a vegan diet have??
It's high omega 6, high GMO, high in seed oils, high in sugar, low in nutrition, lacking essential fatty acids, lacking essential fat soluble vitamins, a stain on the digestion, bad for gut flora, high allergen, high in anti nutrients and that's just for starters.
That's before you consider the negative environmental impact, from use of non renewable resources, soil degradation, high intensity farming, use of pesticides and herbicides, habitat displacement and high kill rate of animals.