Why do people keep plugging a vegan diet?

Anonymous
When no doctor will recommend it, why does everyone keep insisting veganism is healthy? It's not. You don't get anywhere near enough iron and protein. Humans evolved to be omnivores, not herbivores. I've never seen a vegan who didn't end up sick because of their diet.

So why do you all keep trying to convince gullible people that it's good? It's like recommending smoking.
Why do people keep plugging a vegan diet?
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