Many fantasy novels - 'Lord of the Rings', for instance, or 'Lavondyss' by Robert Holdstock - are beautifully written. Geoff Ryman's 'The Child Garden' is exquisite and utterly beguiling. Mervyn Peake's 'Gormenghast' trilogy is an astonishing piece of multi-faceted storytelling. So quality of writing does not condemn the genre.
Nobody has ever thought himself to death. The chief danger confronting us is not age. It is laziness, sloth, routine, stupidity, - forcing their way in like wind through the shutters, seeping into the cellar like swamp water.