Ever tried to get a reservation at a Florida State Park? Many book every weekend through the summer, then cancel those they can't sell or don't want to go...:S.
To the OP, hope your medical issues get better. I don't think anyone doubts your situation, but as evidenced by several postings, as well as the situation mentioned above, there are those that continue to cheat/game the reservation system. THAT is the reason for the cancellation policies...which, I am sure, you'll read completely from now on.....Dennis