What is wrong in your deduction is that you suppose that we all live up great to the moment when we die. Long health span is more important then long life span

What is wrong in your deduction is that you suppose that we all live up great to the moment when we die. Long health span is more important then long life span. Given that the hypothesis here is that sleep deprivation brings the chronic disease its not that simple as measuring percentage of time you spend with your loved ones - what if last N years of it is totally not worth it, for both them and you.