When To Use "Adopted"

While it is important to recognize the fact that someone is adopted, it doesn't always need to be included as the person's primary trait, e.g. "That is X, she is my adopted child/grandchild," or "I love X just as much as if she were not adopted/one of us/my own." When I hear people talk like that, I think of the asshole dad character played by Gene Hackman in the movie "The Royal Tenenbaums." Remember when he spoke about Gwyneth Paltrow's character? He always referred to her as his adopted daughter. Funny in a cringe-inducing kind of way-- it is hard to believe that anyone could be so insensitive. Unfortunately, I know people who talk just like that about their adopted family members. Also, I think of the celebrity families who have so visibly adopted lately-- 99% of everything I have read about them makes a distinction between their adopted kids and biological kids. Why? It just isn't a necessary detail to note most of the time. To me it kind of seems like people who always point out race, skin color or ethnicity while talking about a person when that level of detail isn't relevant. Those same people never say, "I saw a white guy do that the other day" just like they would never say, "when did your biological daughter start school this year?"
Obviously, there is no reason to lie about whether or not someone is adopted. It is pretty obvious in the case of many inter-racial adoptions, but there is no reason to mention it over and over either-- a propos to nothing. That just makes an adopted person feel singled out over and over again. This isn't just my opinion-- this is based on the narratives of many adult adoptees from Korea. Also, there is a psychological theory about labeling-- if you haven't read it, it is, in short, that people are often defined by one trait, called their master status--a.k.a. one's reputation. Everyone knows that labels can be quite limiting. I would hate to see my kid have her master status be "adopted" (unless she wants it to be) because I am sure there will be much more to her than that.