So according to this article, if there was a high-protein, low-carb food with taurine, it would be nutritionally satisfactory? Taurine is already lab-made and added to most pet foods, including animal-based ones. Protein is easy to separate from carbs in plant-based foods. Pea protein, for example, has a 15:1 protein to carb ratio.
I still don't see a case for malnutrition. Every article that claims cats can't be plant based repeat the same "taurine" and "protein" concerns, but again, those are so easily debunked. What magic ingredient of meat is necessary for cats that can't be found in plants, causing them to die a slow, tortuous life of malnutrition?
That is literally the funniest ASCII drawing I've seen.