There obviously is an argument to counter, which is that the way LLMs work does not appear to be in line with any definition of consciousness we have right now. If you disagree with that, then feel free to provide a definition of consciousness that would credibly account for the notion of LLMs being conscious.
It's also rather absurd to claim that consciousness is spiritual woohoo nonsense given that we all have an internal experience. That's fundamental denial of the observed reality. Consciousness does not in any way presuppose that humans are special, but it is a property of the configuration of physical systems where matter is arranged in a particular way to produce patterns that constitute internal experience.