I agree about the prevention meds and the keeping people alive thing.
My grandmother died recently at 99, having completely lost all her marbles 5-6 years beforehand. Yet every time she developed an infection or something, the ambulance would be called and she'd be hospitalised with all manner of tubes and drugs pumped into her. Her final illness, she was in hospital with pneumonia, unconscious for several weeks and we were told she wouldn't pull through - yet they tried course after course of antibiotics until eventually one worked and they declared victory so they could discharge her back to the home. Where she lingered, semi-conscious and tube-fed, for another couple of weeks before finally succumbing.
Meanwhile my dad has been steadily deteriorating with Alzheimer's and vascular dementia. My mum is his carer (as she won't consider a home and doesn't want carers coming - hoarding) and is constantly fretting about his apparently endless schedule of medications for all the relatively "minor" things, rushing him to the hospital or outpatients for every wince or groan he makes.
My mother is horrified at any suggestion that we could ease off on the cocktail of pills for him. And even more horrified that my brother and I - we're reaching the age (early 50s) when her those of her generation were being encouraged to pop all these preventative magic medications - have both decided we won't be partaking in any of these things.