I haven't even argued that AI is concious, I have said that we do not understand consciousness enough to define it. You have completely missed the point. This is Dunning-Kruger at its peak. You are vastly oversimplifying things, at what size of brain is an animal considered conscious or capable of thought? Define thought. We don't even have a solid understanding of life, much less thoughts. Yes we have a word definition, no we do not know where the line begins and ends. It is a philosophical question that remains unanswered.
This definition is already making so many assumptions and over simplifications. https://www.merriam-webster.com/dictionary/thought
We understand that the brain is what gives us our cognition, we understand that the brain is made up of chemical and electrical signals. We are not special.