That's effectively a semantic argument, redefining "consciousness" to be something that we don't definitively have.

I know that I am conscious. I exist, I am self-aware, I think and act and make decisions.

Therefore, consciousness exists, and outside of thought experiments, it's absurd to claim that all humans without significant brain damage are not also conscious.

Now, maybe consciousness is fully an emergent property of several parts of our brain working together in ways that, individually, look more like those models you describe. But that doesn't mean it doesn't exist.