There is at the moment only one malady that has a 100% kill rate
Dementia in it's various forms.
Yet it hardly ever gets any publicity and unlike cancer is largely ignored, from my own personal experience with the medical profession, they will discuss everything else and avoid the subject wherever possible as a lost cause.
When my mother was going downhill, she had two appointments with the dementia unit. Their only concern seemed to be deciding what type of dementia she had. Was it vascular? Or not?
They decided it was probably some mixed sort.
Did this make any difference? No.
Did she die? Yes. About a year later.
Did they treat all sorts of other things? Yes. A liver abscess. They said she had a heart attack - I didn't believe them then, still less now. They prescribed a statin and clopidogrel - and suffered from both.
In my involvement with thyroid disease, I have come across all too many people who were diagnosed with dementia - when they actually had hypothyroidism. Ironically, hypothyroidism rarely obviously causes death. Polar opposite to dementia in that way.
The whole of medicine is divided into areas where there are some bright medics, good diagnosis skills and ideas about treatment and support. And those where at best there is a formulaic, tick-box diagnostic process, little investigation, little or no treatment. And effectively no support.