Why don't more places allow us to rescind our adoptions?

Since adoption is a HUMAN construction (rather than an act of nature) and the person who is adopted generally had NO SAY over the choice(s) made for them, IMO, the adopted person SHOULD have legal recourse to remedy it if they feel it to be necessary. It seems only fair that they should have SOME kind of say at SOME POINT. After all, we are talking about HUMAN BEINGS here, not chattel.