Docs use the "best interests of the child" line becase who can argue that Docs dont actually beleive that?
Also because the children are too young to tell anyone that this is not in their best interests.
Docs have even, then, as our children get older brainwashed them into beleiving that docs is doing what is "in the best interests of the child" and that everyone else is out to hurt and lie to them!!
Thats my experince anyway