You are denying that humans must drive these events. To say a "fedgov" agent's opinion doesn't matter is to seek some sort of unattainable nirvana. Thank God the framers knew better.
Some human being or group of human beings MUST have the final say. And any honest person will see that the words of the Supremacy Clause, which gives supremacy to the federal government trump any attempt at state secession because a secession ordinance is a "thing" in the laws of that state which cannot withstand the Supremacy Clause.
Walt