Really no surprise that family members would want to romanticize their memories of a lost loved one. People generally do this kind of thing in private conversations with family and friends. In this case, because of the Kennedy name, they got a bully pulpit to do it.
I'm not angry about it, but I do agree with you - a complete waste of time.
ABC agreed not to show the film in exchange for this! The film would have had more truth in it.