What's there to grief?

Human beans have made progress in many fields, in leaps and bounds. The one area that is most neglected is life's journey, living and dying. All the best brains do not think the understanding of the meaning of life is that rewarding and devote their energy in science and technology and in fields that are more rewarding in material comfort. What ended up is that the meaning of life is left to many rascals and half literates to interpret and formulate for the rest of the beans to observe and follow. Why should there be grief when someone passes away to start another journey in a different realm of existence? For those who believe that dying is the end and nothing happens after that, dust to dust, I can accept their belief. I can also accept whatever beliefs about life after death. My belief is that there is life after death and living is just a short sojourn on earth. No need to go into big argument about the different beliefs here. My question is that why should there be sorrow and pain when someone has lived a good life, a life of abundance, a life of comfort and luxury, having everything there is to have? There could be some sadness for the living that the deceased will not be around anymore. But it is nothing more than going on a long vacation. Grief and sorrow are understandable for the down trodden who did not live a good life, depending on one's individual interpretation of good and bad of course. The deprived, the people who are struggling to have the minimum of material comfort and necessities, full of wants but not having them, those who died living behind dependents to eke out a living on their own, those who left behind young and helpless children, those who have many unfulfilled dreams, unfinished tasks, there are reasons to grief and to be sorrowful about. The Chinese custom also acknowledges that people who lived a good life calls for a celebration. The green joss sticks were changed to red joss sticks. There will even be live shows and orchestras at the funeral. Such death is called 'hee song', meaning happiness cum sadness, a mixed of both. But in most instances like this, the family is well off, abundance of children and wealth, and the deceased live through a ripe age, generally above 80 with at least three generations of family relations, and passed away peacefully. It is time to understand and appreciate life and what is a good life. It is time to re edit the customs to see life in another perspective, and call for celebration in recognition of a life well lived.