Maybe so, but you're in that predicament by choice. Your sister keeps trying to get you to move nearer to her.
That'd be smart, too. I'd guess that my family's care extended my mother's life by eight years and my father's by three. In dad's case, it might not have been worth doing, but my mother's eight years were mostly good ones.
A German friend of my wife's was found in his home dead after he apparently cut himself shaving. The guy was on blood thinners and he bled to death. Blood was said to be "everywhere." Apparently it took a long time, and there was nobody there to help him.
Older people NEED someone savvy to advocate for them at doctor's offices, hospitals and homes. If you don't have anyone when you could, you're making a huge mistake.