Vegans and vegetarians want to legislate meat eating away, and there is a lot of nutritional deficiencies and allergic reactions that come from vegan eating that carnivores / omnivores would want to avoid.
There is a big moralizing streak in veganism, and a lot of vegans are into it from ethical, moralizing or emotional reasons, which leads to activism and trying to ban, tax and reduce meat eating. We see where the puck is heading.
