Toward your latter paragraphs, I am reminded of the medieval practice of reflection on mortality, momento mori [0]. There is a great deal of extant architecture and art meant to inspire one to meditate on the subject, for example the Capela dos Ossos in Portugal, whose entrance bears the phrase Nós ossos que aqui estamos pelos vossos esperamos ("We bones that here are, for yours await") [1], and the imagery in Pieter Bruegel the Elder's painting The Triumph of Death [2]. It's unfortunate that, despite the amount of rich Western thought dedicated to such contemplations, popular modern literature, as you observe, seems at least generally averse to the subject.
[0] https://en.wikipedia.org/wiki/Memento_mori