Former NFL player Michael Oher claimed that he was never legally adopted

Makes sense.
Even during the release and the hype of “The Blind Side,” he was pretty apprehensive about the movie.
I bet he was. He was portrayed as a simple minded man-child while the family were his guardian angels who swoop down, take him in, and teach and motivate him play football at a high level.

I can see having his life story presented as a "white man's burden" trope would be pretty insulting and offensive, especially in light of his collegiate academic accomplishments that Chuck pointed out.