are all older men crazy, or is it just my father?

First, some background, so you understand who my father is:
Years ago, my parents went through a bit of a drinking phase. My sister calls this time period "the years of never-ending embarrassment" because my dad loved to order Sex on the beach (as in the drink). At any rate, they went to some all-inclusive resort in the Caribbean for a 7 day holiday, and on the 5th day, my father woke up blind. My mother (quite understandably) freaked out and wanted to take him to a doctor. He not only refused to go, but he also refused to go home early. He insisted on making the most of the rest of their holiday while blind.

Finally, my parents came home and my dad went to see a doctor, who told him that he was actually a diabetic and that he had gone into diabetic shock because of all the sugar he was drinking. But the diagnosis isn't the point of the story; my father was crazy enough to spend two days in a foreign country, blind as a bat, without getting help, of his own free will. Crazy person, no?

So here's the story of this week:
My parents have a cottage where they spend most of their summers now. Of course, this cottage is in the middle of nowhere and they refuse to get a landline, Internet access, or a cell phone. Since I hadn't seen them or spoken to them in a while, I decided to pack up my bruised tailbone and spend last weekend with them.

Saturday was a great day, but then Saturday night I was woken from sleep at around 2:30 am by a big thump. My father had gotten up, lost his balance, fallen over, and hit his head on the wall. Insisting he was OK, he went back to bed. Well, the next morning he was so not OK. He couldn't stand up on his own and refused to eat because of nausea. I know enough about medical stuff to understand that that could be just an inner ear infection, but a voice in my head kept saying that it also could be a stroke (especially because I'd just read this). I called around to a bunch of doctors in the vicinity but nobody was working on the Sunday of the long weekend, so I suggested that I take him to the hospital in the area, if only to get him a drip so he would feel better. He reacted violently to the suggestion, insisting that he was OK. This went on all day, and I don't think I slept for more than 20 minutes that night.

The next morning, when he was no better and asked me to walk him across the house, I lost my mind. I told him that the only place I was walking him to was my car so that I could take him to the hospital. He refused to go, so I packed my bags and left. Yes, I left my sick father in the middle of nowhere with no means of communication, and, since their plan was to stay until Wednesday, I spent the next two days waiting for my phone to ring, hoping that my dad wouldn't be in intensive care somewhere. No sleep was had.

At the end of the day, he apparently got better, but then, he didn't go to a doctor at all, so who knows?

Is this how men get when they get older? If I end up with someone who's seemingly normal now, is this inevitably what I'm going to have to deal with once he reaches retirement age? Or is my father just a crazy person?