Neither do doctors and judges I guess.
If they are acting in their professional capacities, legal constraints and the crude realities of the family court system may prevent them from doing what they would personally prefer to do.
Friends and family are often more useful than the professionals. It helps for an adult without a financial motive to say to the kid, "I see exactly what you are going through. That sucks. Let's change that."
(Of course I do not know if that would have worked in Adam Lanza's specific case.)