When a man swims he gets wet. Objective is not to get wet but swim. Objective, purpose and nature of man is to live. Moreover, first day of life - a baby and even a child has very little or no awareness of death.
In fact man lives as he is never going to die. Mortality is sought as embodied in the holy grail. It's all a load of myth but never the less it's what man craves. Man has even created God to prolong his life in eternity. False as it maybe but it is facilitate his life for ever. Death is pushed as far away in his mind as he can.
Nature is the circle of life. Any individual species may have a starting and end point within nature but nature as describing that circle does revolve as in the seasons repeating in time.
Saying and creating fancy words like it is the nature of man to die; he begins to die even as he is born doesn't make it so. Child growing up is developing and shouldn't be considered as dying.
guys - you really need to get out more