100% true. Our understanding of the human mind and how it works is still in its infancy. Doctors who try to tell you that they have "the answer" are at best omitting a lot of relevant data for a parent.

It is frightening how easy the docs are with the drugs, when often something as simple as diet change (standard American diet includes a crapton of chemicals and sugar that can often be at the root of behavioral problems) can solve the issue much more effectively and less harmfully.