If you would rather look at the bright side, which I advise, you can also say, quite accurately, that LIFE is the ultimate reality in the Natural World. DEATH, however, is inevitably related. The Natural World does work on the basis that life comes out of death, and that everything that lives must die. There is simply no doubt, as to any individual person, that death is inevitable.
I also think that the flavor of our personal politics is quite likely related to our personal willingness, or not, to accept death as a prevailing reality of our existence. Those researchers who found a correlation between thoughts of death and a political preference for Donald Trump are probably on to something.