The ones keeping the kids locked up in the systems are liberal administrators who rush applications through for same-sex couples but investigate for years (at great cost) adoptions by heterosexual couples.
You're right on the money there: as one who has adopted, it was enormously easier for my wife and I to go through endless INS and State Department hoops (navigating the Russian bureaucracy was a walk in the park by comparison), go to Russia, travel to the "outback," go to court there, and adopt a young Russian child than it ever would have been here.
Maybe because we're white, and normal.
The Minority Heritage Preservation Act in Minnesota prohibits White people from adopting minority children.