I don’t love the disregard for plant life just because they lack the central nervous system of animals, but this isn’t an argument in favor of eating animals. If you want to argue it’s better for us to die than to live via harm, that’s one thing, but if you accept we have the right to live at the expense of other life forms then the goal of many becomes to minimize suffering.

While plants do have sensory experiences which elicit behaviors, they don’t experience the world in a personal way; they’re like a robot or generative AI. When a dog suffers, it has a concept of self and an understanding of what is happening to it, and it will carry memories of the experience which negatively influence its quality of life.