Some people see death from aging as eventually being curable. Obviously, something is going to kill you sooner or later. But why must it be old age? Assuming yo

Some people see death from aging as eventually being curable. Obviously, something is going to kill you sooner or later. But why must it be old age? Assuming you survive long enough, who wants to spend their last years in body that's breaking down, with diminished cognitive and physical abilities?