Why can't celebrities learn that children are not pets!

So Angelina Jolie has announced that she loves her newborn daughter as much as her two adopted children. Why is this supposed to be such an amazing thing? She decided to adopt these two little ones, and Maddox who is only 4 has spent most of his life with Jolie on his own, has already had a lot of change why on earth would she love him and Zahara any less after all they are both adorable and she is their mother, whether she gave birth to them or not. I'm glad and relieved that little Shiloh's birth has made no difference to her feelings for her elder two children, but I am saddened that she feels the need to announce it to everyone, just because they are adopted doesn't mean that she or they have anything to prove.