You may not want to think about it, but you are going to die sometime. That's it. A lot of people are afraid of death. I have no fear of death, because I know it is inevitable. The philosopher Thomas Nagel wrote in his work "Mortal Questions" that death, was a part of living. So you should view death as "completing the totality of your existence".
Maybe a better example for nerds, I'm watching "Space:1999" right now on broadcast TV . . . dubbed in German! Anyway, for some reason, a planet of folks become immortal. They have some kind of cell regeneration that makes them live forever. Their society degenerates and becomes corrupt. Because death gives life a meaning. Without the thought of death, living has no meaning.
These morbid jokes about Truck Factor or Bus Factor in no means devalue the worth of life. They are simply us looking into the future, and tapping on a subject, that most of us would rather avoid thinking about.