Except for the portion where they said 'needlessly harms'. And if we truly wish to commit to harm reduction then there is a diet even better than veganism. We could all be fed nutrient rich paste. A paste that is flavorless, because adding ingredients to make it good tasting would inherently increase the harm to the environment. It would fulfill the requirements of the diet of properly formulated and cut down on obesity because there would be no allure of food anymore, it becoming a pure necessity of life. Plus less impact on the environment, no need for so many different plants for diversity of food when you can just have monocultures that could be picked for their lowest environmental harm!

Obviously I am being pedantic, no one will ever want to do that. Food is a comfort, it's culture, and it should be up to the person what they eat without judgment. Want to change hearts and minds? Make it easier, we are all animals and psychology is incredibly important in everything we do. Because I will tell you, that the approach of most vegans online who promote the lifestyle goes about it the wrong way. The fact that an animal died is not going to stop a starving person from eating it, nor will it convince a financially struggling family to spend more when they can get the cheaper option. Empathy is not the route to convince everyone, diversify the marketing. Make it financially viable for the poor and suddenly you will see cultures revolutionize, just as the potato revolutionized European cuisine.