sleep is preparation for death
I don't know what this phenomenon is called in psychology or any other science, when thoughts about death evoke a primitive subconscious fear, and the brain desperately tries to switch to another topic, just to avoid thinking about it. Have you noticed that when falling asleep every day, you essentially die for several hours? No thoughts, no self-awareness, complete emptiness, as if you don't exist at that moment. Then why does our brain desperately fight against this idea if we essentially experience moments of death every day?
The topic of death is considered taboo in our society. No one talks about it, everyone avoids this topic as if it will never affect them. It's funny to look at, actually - we all get closer and closer to this event every day, but we close our eyes to it, only coming to our senses when "it" happens.
Many philosophical practices are aimed at accepting the inevitability of this event to some degree. And I understand those who decided to distance themselves from these thoughts or accepted the inevitability of this event. But what surprises me more are people who live life as if death doesn't exist. They wake up every day, do some things, go to bed, 60 years pass, and they suddenly remember that all this won't continue forever? Perhaps this is the best way to deal with the inevitable.