I'm glad you didn't feel too uncomfortable growing up, and you eventually tracked some family down. 
I had heard that many struggled in similar circumstances, and that because of this the recommendations/laws(?) were changed so now, children can only be adopted into same culture families.
I felt maybe it was a bit heavy handed, rather than trying first to find a loving right ethnicity family, but if one is not found, then finding a loving family and making sure new the family educate and explore the child's heritage. (I don't know if they do now, I just know I heard about it a few years ago)
you think that's sad? Why??
Why is it not sad? a child growing up surrounded by white people but looking in the mirror and seeing how different they are, but not knowing why. Not knowing about what makes up their heritage, there own identity.
Not at all the same as the OP. But did you know in Australia baby's were taken from aboriginal's and brought up as white in white families, and denied any access or information of their race.