I do think veganism can provide some health benefits since vegans generally stay away from industrially processed foods and avoid sugar.
But what if unfriendly aliens show up and wipe out civilization as we know it.
Or a super bug causes infections wiping out most of the world’s population.
Maybe a war breaks out that causes irreparable damage to our infrastructure.
They’re all unlikely, but what would happen if people from wealthy nations found themselves without their normal, extensive support networks? Back in the wild, how would most people adjust? In the wild, how long would vegans last? Have you ever met a vegan that you thought could beat you up? I didn’t think so.
Would they quickly revert to eating animals or hold strong, and probably perish? How long would it take for a vegan to abandon being a vegan?
Who knows. But I’m not too worried. Most vegans would probably start eating meat pretty quickly if our world were to suddenly force us back into the wild.