You are absolutely right and I am sure that his father, Juan Carlos, would have handled it differently.
In the history of the Spanish monarchy, both Hapsburg and Bourbon, as in the history of all royal houses, can be found outstanding monarchs followed by horrible offspring. The good monarchs tended to be those who "suffered" humbling circumstances or other crisis during their youths and had to overcome such things. The bad monarchs tended to be those arrogant spoiled brats who were handed everything on a gold platter.
In the modern era, an arrogant King will soon become a deposed King.
For the sake of his humility, it would serve the Prince of Asturias well to read again the old oath recited to his royal ancestors by their Aragonese subjects:
"We who are as good as you swear to you who are no better than we to accept you as our king and sovereign lord, provided you observe our liberties, but if not, not."