She brought the monarchy back on course, and brought stability into the troubled world of the princes, while being unpopular and widely vilified. She id all this with a dignity which could serve as a model of behaviour for some of the other Royals, and she continues to do so.
I swore allegiance when I enlisted. Although you take the oath when you join, you are not released from it when you retire.
"The queen is asked for her approval but it's a courtesy."
I can assure you it is not, as would be apparent if any of the royals tried to christen a Kylie!