Brain Insurance

Recent Israeli work suggests that our brains have a mechanism that only associates death with other people (https://www.theguardian.com/science/2019/oct/19/doubting-death-how-our-brains-shield-us-from-mortal-truth). Although death (and supposedly taxes) are the only things that one can absolutely rely on, it appears likely that recognising our inevitable ending doesn't help us to successfully operate as biological entities. It seems likely that this 'double think' is a very human characteristic but I wonder if other cognizant beings operate in a similar fashion?