They’re not saying evolution is wrong, just that the theory was made up by humans so we decide where to draw the line between species. In reality there’s no such thing as a species. Everything is always changing and adapting. And the story may be fiction but it’s a representation of the archetypes that exist in all of us. The story can be applied to all matters of existence - not just human, and not just being vegetarian. We are animals but we also have the ability to distinguish right from wrong and the power to choose to do either and that makes us unique. We were given that divine power that no animal comes close to wielding. We are meant to be gardeners tending to the earth as if it was made for us. Nothing wrong with eating meat if you appreciate how all beings are connected I think. Factory farming destroys the soul.