Vegans need supplements to live, those come from butchering animals.
One major fucking cope I read about this is about B vitamins. You get them primarily from meat, so much so that B12 is a major concern for vegans. The mythos about how a vegan diet can be so deficient in something important like that is that humans would naturally get their B12 from bacteria in the dirt that used to present on vegetables before modern sanitation caused plants to be so consistently clean for consumption.
So, in their head, this makes their diet viable, they're just "supplementing" nutrients they're missing from a diet that naturally included fucking dirt.
One major fucking cope I read about this is about B vitamins. You get them primarily from meat, so much so that B12 is a major concern for vegans. The mythos about how a vegan diet can be so deficient in something important like that is that humans would naturally get their B12 from bacteria in the dirt that used to present on vegetables before modern sanitation caused plants to be so consistently clean for consumption.
So, in their head, this makes their diet viable, they're just "supplementing" nutrients they're missing from a diet that naturally included fucking dirt.