[mihalycsaba]

It makes a lot of mistakes. Without modern medicine we wouldn't live this long. Alzheimer's is not a modern disease.

[hello_computer]

The primary improvement to human life expectancy was not medicine, but public sanitation. Prior to that, death was bi-modal, with peaks at infancy and old age. When people (and doctors) started washing their hands, the infant peak was flattened. Dead toddlers really kick the average in the nuts.