For me it's self evident the argument is false by way of contradiction. Assume it's true. There exists a consciousness nerve cell, with a nucleus and such as all nerve cells have, somewhere in the mind. As far as how the brain is "built" during the embryonic stage, you'd expect that cell to have a typical "home" in the brain or brainstem somewhere.
Then that "home" would be a known spot where if a stroke occurs, or other damage, at once eliminates forever that persons consciousness. But not so common core area such as this has ever been found, suggesting our assumption in the first place, that such a cell exists, is false.<p>Now that's one extreme, the all commanding cell. It's also self-evident that cells aren't some 'set of equals' commune. Of course there are master cells that activate other cells in certain conditions. This is seen even in our deep learning nets where you may have a "I see a cat" neuron and "I see a dog" neuron that triggers the response program for those things.<p>That's all to say, reality is a place in between