Of open adoptions that are honored and do work, the children seem well-adjusted and more at ease with their own adoption issues by being able to have contact with their birthparents.
Sorry, I'm not a 'genetic donor'. I am a parent who did not raise my child. It has been proven that a mother carries her child's genetic material for 40 years, and there is not only an emotional but chemical bond for life. Not to mention carrying and bonding with a child for 9 months, going through labor and childbirth, which a woman NEVER forgets. To trivialize a birthmother's role is cruel and not one of someone who is informed about adoption issues. Just because YOU have no desire for contact does not mean millions of other adoptees do not want and would not benefit from contact.
And the majority of the time, birthmothers were extremely coerced and lied to into surrendering their children -- there was no 'choice' involved. Read my story for just one example. My birthson is one of those 'happy, adjusted adoptees' as you are. I am very glad that his parents raised him well and he seems to have no issues with his adoption. Of course, that might be because I was able to write and tell him exactly why and how his adoption occurred.
http://www.geocities.com/CapitolHill/2991/marybb.html