It doesn’t need to be invoked, the higher moral agency placed on humans hinges on the notion of superior human rationality. You could choose to be a vegetarian and choose not to kill animals, but that doesn’t mean that it is a more ethical or moral choice because human biology evolved to require meat other wise it requires planning and supplementation that is not necessarily possible outside of industrial societies. I do agree that choosing not to eat animals due to the industrial nature of meat production is a more ethical choice, but not that killing animals is necessarily wrong.

I may not be explaining it well but basically: the idea that humans killing animals is wrong can only exist if you think humans are superior to animals. I reject that notion and that’s where my argument comes from.