For
They have a right to know their origins and identity.
Against
It might hurt the privacy of biological parents.
Anonymous excerpts, translated where noted.
“Opening records isn't about reunion although it can certainly lead to reunion, it's about equal rights.”
“Most adoptees I know want to dissolve any secrets about their history or want to know family medical information.”
“To keep my peace, I wanted a closed adoption. I’ve written down my medical history, but that’s as far as I’m willing to go.”
“Remember the people you’ve matched with might not know anything about your birth parent(s) being pregnant with you. Use that information carefully.”