Why use ethical reasoning in business?

ethical reasoning can be use....in many aspects of business...if one ask or question about what you do or your business do.. u can use ethical reasoning to defend yourself as well as your business reputation because "if what is good in your company, can be bad to others and what is good to others , can be bad to you . this question refers that each individual or a business entity cannot question his move because as a man we all know what is good and what is wrong.. it depends to the morality of a person if he question your ethical standard or norms.