>>How does an appeal to the authority of the holy spirit qualify as deification in one instance, and not the other?<<
Simple. I am the final authority regarding what I choose to believe and what I reject as false. God gave me that right and responsibility. It is not self worship.
“I am the final authority regarding what I choose to believe and what I reject as false.”
Finally, a honest answer. If you are the final authority, not God, then you are God and God is something else.