If you watch carnivore animals like sharks, lions, cats etc they see a living creature as food. They kill it and eat it right then and there. Most humans would heave and vomit at the sight and smell of a dead bloody creature with it's guts torn open but meat eating animals love that.
Humans on the other hand see fruits and vegetables in the same way as carnivores see other animals. Show humans apples, oranges, plums, pineapples, melons, etc they think mmmm I want to eat that. The sight and smell of those fruits is appetizing to humans. Dead and dying animals are not.
At some point in our history humans found they could cook a dead animal and its cooked meat was appetizing. It might be interesting to know how that started.