No it's proof of how ridiculous I find the idea of a hereditary head of state.
Just remember that regardless of how ridiculous you find the idea of a hereditary head of state to be, Queen Elizabeth is still the Queen of England. 
Actually, no, she isn't. It's like saying that Barack Obama is President of North Dakota. Remember what I said a few posts back about royal titles and styles

?
The last "Queen of England" was Anne (from 1702-1707, when England and Scotland were united as one kingdom, as opposed to two kingdoms that shared a sovereign) and she then became Queen of Great Britain ( - 1714).
You can read about Queen Elizabeth II's titles
here, though, like any Wikipedia article it may have it lapses.
BTW, I do appreciate that Tallitot has taken the time and trouble to research some of HM's lesser known titles.
In fact, Tallitot is quite right that a "hereditary head of state" is ridiculous. "Head of state" is republican terminology. A hereditary
sovereign, OTOH, is an entirely different matter.
Now, to get back to the OP: I pray the HRH will recover fully and that plans for Jubilee celebrations next year will not be affected by his health (or that of any other key person, of course).