That is stark.
But think about stages of living: after high school comes college (often), or perhaps a job; after college comes a job (or maybe graduate school); after a job comes moving in with someone, usually eventually getting married; after getting married, having a kid(s); after working for a while, getting another job, perhaps changing careers if you're lucky enough to have that freedom. After working for a long time, retiring. And what comes after retiring? A new career, yes, that's always a possibility; travel, if you've got the money. But what comes next? There's always something coming next. Until, inevitably, the end. Death. There's no avoiding it.
So retirement makes death feel that much closer. Leaning over your shoulder, perhaps. Breathing down your neck. Poking its hands in your pockets to keep warm.