Providing medical service in exchange of money many be called business. Though by any logic that is not unethical, but certainly that indicates the biased intention of user of the word. Medical science has not been successful to percent death, for certain reason of nature's ecological balance. it is also true that death of anybody is traumatizing. But unfortunately in spite of all human effort people die. Only some ungrateful service seeker points guns to soft targets like physician mostly to cover their negligency.