It is because our future is uncertain, this is the case with almost everyone in the world except of those which have a great destiny, only they are the livings who have a certain future till they fulfill all thier destiny.
The destiny is set by this world itself as it set the death, events and actions of all the person involved in the destiny while it select the person it want to make a scoin aka protagonist as it arrange opportunities, heroines and power ups for him before ending the plot.
The end can be in anyway, it can be death, happy life thereafter or a person leaving the world for another.
Tom was destined to leave the world in the end of his destiny and after that, his luck will not be manipulated by this this world, whether the other world still want to continue his journey as a Scoin or not, it depends on that world.
But it do that almost everytime as it is easier to find a new person and start the journey from the scratch.
