The idea of not having control over death is terrifying to many people, so they choose not to think about it. Thinking about death means looking at one's own life so far for context, and a lot of people don't want to do that, either.
Looking to the past, they may feel loss because of things that happened, and they may feel regret over things that didn't.
Looking forward, they may feel apprehension over the unknown outcome of their estate's eventual resolution, or they may feel anxiety about their surviving family's future welfare.
This entire topic can elicit a number of very uncomfortable feelings. Some of them are more painful than others. However, refusing to acknowledge and act on this matter will result in the burden of an even worse feeling later on.
The feeling of GUILT .