Designer Babies

I believe that designer babies are not unethical and unfair.  I feel this way because they are given a chance to save someones life and be a hero to someone.  Although they may not have been planned beforehand they are planned now and have a purpose which is a lot more than what many other children have.  Would you rather be known as an 'accident' or as a hero to save someone in your family.  This process is no more unnatural than using phones to communicate instead of speaking face to face or using eating utensils instead of our bare hands.  Would you rather allow a child to die instead of saving their life and bringing another new life into the world at the same time.