And honestly, animals will play an important role in sustainable agriculture, so animal products will still be part of our lives. I was watching a presentation about soil health by a farmer. They don't use fertilizers, pesticides, irrigation, etc because of a system of cover crops, free range animals, and mob grazing(a dense herd moved through the field quickly to trample and poop all over) to build healthy soil. The problems we have are from factory farms, monocultures, and destroying old growth ecosystems so more people can consume in excess, instead of moderation.