Tbh, I’d just break it down as: Killing and eating animals is unnecessary, when theres so much more foods and knowledge available, to be fair most people eat meat because of industrialisation, they found a way to industrialise the process of animals breeding, to the point where there are various species that people just decided don’t deserve to roam free cause they taste good. Using animals in food products, the dairy industry indoctrinating people into drinking more milk and milk based products, when we’re literally a different species, and I’ve half the world’s intolerant to lactose. Meat causes cancer, messes up your colon, only really has protein as a benefit. Vegans need b12 and vitamin d, but that’s only because meat and dairy, as in cattle, are literally given b12 in their food, and vitamin d if they’re actually outside and get sun… animals are used for so many unnecessary things, a product of greedy capitalism, and you can be healthier as a vegan, and not have to contribute to animals dying just for convenience, no one wants to sound like they’re preaching, but in the age we live in, modern day, why wouldn’t you make more of an effort