The thing about ADHD though, as far as I can tell from researching on the internet and from one of my nephew's, is that there is no physical proof of anything that is wrong in the brain. Like there is nothing to see. So, I don't think you can criticize Nuothetic counseling for that one or instances like that. I have not gotten the impression that they deny actual brain defects or injuries that might cause behavioral issues. If they do, then I would agree with your assessment of that aspect of the counseling being in error.
However, with disorders like ADHD, I believe being suspect of it is has some merit. Have you looked lately at how many child are diagnosed with it and put on some drug at a young age? All of the symptoms appear to be what happens when parent's decide not to disciple their children or just general bad behavior (e.g. Often fails to give close attention to details, Often has trouble holding attention, Often does not seem to listen when spoken to, Often does not follow through on instructions, Often avoids, dislikes, or is reluctant to do tasks that require mental effort (lazy?), etc.). And again, there appears to be no proof of anything physically wrong or different with the brain.