Well I could ask you the same thing - what does Madonna, Sandra Bullock, and Theron adopting children who are Black...have to do with being an "IT" Hollywood thing?
You stated that many adopted are in fact NOT orphans, however the reality is many Black babies adopted (as well as any race of baby frankly) still have families, and those families willingly gave them up for whatever reasons.
You included children with family who you say were removed by Child service abuses....the men in Madonna's Mercy's family wanted her adopted out, while her maternal grandmother did not (her father claimed he didn't know she existed (uh huh). Regardless, her grandmother wanted Mercy placed in an orphanage for SIX YEARS, with the intent to come back for her. When Madonna learned of this, she didn't adopt her and adopted David instead. Only when years later she came back and saw Mercy still languishing in the orphanage with no one to hold her, hug her, care for her....I mean, can you blame her for wanting to take her and give her a good life? Do you really think that Mercy's grandmother would've come back for her? You should read up on Mercy's life..it was not a pleasant start to it.
And Angelina's Zahara WAS an orphan. AIDS took both her parents.