..that's Her job. That's why She exists. She guides the dead to their destination, whether it be heaven, hell, purgatory, reincarnation, no where or anywhere. A couple have even remained here for a time. It's all to do with their beliefs. If they didn't exist neither would She and if She didn't exist, no one could die.
But that doesn't mean She's evil *he says hurriedly, realising what he'd said* they will still die, they would just have no where to go and get stuck on earth. In the past they have forcibly reanimated their bodies to try and kept moving while the body still breaks down and tries to rot away, it's not a pretty sight.
*she yawns, she is hungry but she doesn't really have the energy to do anything at the moment*