Dad's Missing

My sister just stopped by our house to let me know that my 92-year-old stepfather has been missing since noon today. She last saw him at the cemetery where my mother is buried, and said that he seemed disoriented; she put him into his truck, made him drink some water he had there, and told him to go straight home. He never got there, she and her daughter have been to all his usual haunts, and there's no sign of him.

Now, he makes this trip to the cemetery at least twice a week, so he shouldn't have become disoriented that easily; plus, his bank is on the same street, and he goes there once a week, so this is not unfamiliar territory. But he has been getting vague of late, and of course, now she's kicking herself for not having foreseen that he couldn't drive ten miles from Point A, where he goes 2-3 times a week, to Point B, where he lives.

OK, somebody want to go into this with me one more time, why old age is supposed to be such a freaking blessing?!?!?!