Life and death

Why do we pay so much attention to such a concept and event as death. Everything that has a beginning must have an end. Otherwise it will be infinity - and this in our world is impossible.
Life and death, always accompany each other, they are not inextricably linked. It's like two sides of the same coin. But all our lives we are in captivity of our pleasures. Therefore, the approach of death we try to detach in all ways.
In fact, human death, natural, is the same holiday as the birth of a person. Death saves us from suffering and inability to fulfill our vital functions. The body ended and decided to complete the work for good, since its repair is meaningless and will not lead to anything good. Is that to replace all the details, but so far it is impossible. If people learn to replace parts of our body, then maybe remotely, live forever. But then the individuality of a person will be lost. Its members will have different DNA, and we can not infect humans at this level. However, the question remains, if the organism has protection in the form of death, then this information is prescribed somewhere. I think the egg cell from which our body develops, lives somewhere in our body throughout life. And it is with her death that the life of the whole organism ends. Perhaps this is a stem cell, but it is. Here it would be to find it and reprogram it. And we already learned how to change the organs