If I see myself as a physical body, than there is no need of Vedas or Upanishads.
Physical body needs unlimited sex, unlimited pleasures, unlimited Gulab Jamun, unlimited foreign travels and many such things to entertain it.
Why we earn money or want to achieve objects ? Because we want to make this physical body comfortable with pleasures & enjoyments. We run behind money, girls, houses, lands e.t.c to achieve them. This desire is never ending. In every birth, we want to achieve & become happy & die.
But the problem is Karma, And their results. It always doesnot give results. Suppose if I loved a girl & i made efforts for years for the same. But still in the end I can be left empty handed.
Results may come or may not. And every failure to achieve leads to anger, revenge, pain , suffering, suicide, mental problems, depression e.t.c
When we have suffered a lot, than men questions, If I cannot get what i desire than why I am born ?
Than someone answers that please study Vedas & Upanishads & figure out that what you want to achieve is not your correct purpose.