scientifically, an organism that does not eat meat is a meat eater.

That’s not science, that’s religion. You’re talking about destiny. You’re saying cats have an essential nature which is not affected by the conditions of their lives. That the physical reality of what a cat eats does not determine its diet, that there exists a deeper truth based on what nature “intended”. Nature doesn’t have intentions. Cats were not created by an omnipotent god. Their place in the world, their role as animals, their diet, is malleable. And it changed a long, long time ago. Humans get to decide what cats are, and they’ve been deciding it for thousands of years. Humans decided to create a technology that makes cats no longer carnivores. You’re citing outdated information. You might as well say pandas are carnivores.