The more I think of it, the more I've come to realize that, at least in your "normal" agency adoption, coercion is a necessary element of adoption. In order to get a women to surrender her child, you first have to convince her that she would make such a terrible mother, that her child would have such a miserable life with her, that she can best serve her child by rolling the dice and sending her home with total strangers. You have to convince her that she is such a threat to her child, that she will be making the best parenting decision by giving up her right to protect her child from harm, to make sure her child is always happy and safe.
Does this seem like the conclusion that any woman can come to with an ounce of self esteem? Does it sound like a decision that can be arrived at on one's own accord? No. This requires brainwashing. It requires demolishing any self esteem. It requires preying upon weaknesses.
And then, we wonder why it is so impossible for mothers to carry on with their lives, missing their flesh and blood child, and convinced that they are worthless.