Death is inevitable, but the fear of living without a sense of purpose and accomplishment in the presence of death is far worse than death itself, we don’t want to live forever, we want to create something that does.
A notion of an afterlife for some can enrich their lives to achieve this completion, living a life filled with righteousness and integrity, but it can also slander it by having the belief that we get another shot at existence. It’s a double edged sword hence it being a bit 'iffy.' Ultimately people will have to figure out what works for them.