Excel and Powerpoint are not conscious and so there is not reason to expect any other computation inside a digital computer to be different.
You may say something similar for matter and human minds, but we have a very limited and incomplete understanding of the brain and possibly even of the universe. Furthermore we do have a subjective experience of consciousness.
On the other hand we have a complete understanding of how LLM inference ultimately maps to matrix multiplications which map to discrete instructions and how those execute on hardware.
I know I have a subjective experience of consciousness.
I’m less sure about you. Simply claiming you do isn’t hard evidence of the fact; after all, LLMs do the same.
If there were evidence that one LLM would be conscious I would also accept it for others. However this is not the case.
But we know at least one human is conscious. That‘s convincing me.