Nicotine is a nerve toxin. It protects plants from pests by disrupting their tiny bodies. Not as toxic to us because we’re simply larger. You can give tobacco to horses to deworm them. The leaves and roots of nightshades have higher levels of nicotine to protect the vital parts of the plant. But the fruits have lower levels because the plant ultimately wants something to eat the fruit and spread the seeds. You can safely feed peppers and tomatoes to chickens. But not the leaves of those plants. Also his claim that people aren’t addicted to vegetables is false. People addicted to nicotine from smoking/dipping/vaping do notably consume more potatoes. BECAUSE THEY HAVE NICOTINE IN THEM.