Scattered Thoughts: Not for longer Life, But for Shorter Length of Disability

My mother has Dementia due to Alzheimers for about 10 years. Her prolong illness has affected the well-being and the quality of life of family members negatively. Man's average lifespan is 79 and woman's is 83. The length of disbility prior to life-end is 6.5 years for man and 7.5 years for woman. I see many people doing all kinds of health-enhancement activities, like food supplements, morning exercises, Qigong, etc, to live longer. Really, to live longer should not be the key objective. Reducing the length of disability, perhaps from 6.5 years to 1 year, should be the key objective. There is no use having a longer lifespan, when the length of disability remains the same. In fact disability is even more painful when the lifespan is longer. Increasing lifespan, without reducing the length of disability, is the curse of longevity. Sadly, modern medicine aims to prolong life, at the same time prolonging the length of disability !