This is the problem. Just because he is an expert doesn't mean ALL of his views are correct. For instance Dr. Russell Barkley believed earlier in his career that having sugar in the diet will make ADHD symptoms worse. Years later after much more research he found out that he was wrong and that people with ADHD should sip in a bit of sugared water to focus better.
This is the problem with building a cult around a personality. Science is basically built off of hypothesis. Some of which will be proven wrong by much further research.
There is this thing called Constraint-Induced Movement Therapy (CIMT) developed by Edward Taub, a behavioral neuroscientist. There was extreme skepticism and resistance from the established medical and scientific communities. Taub's work challenged the prevailing belief that little could be done to improve function in limbs affected by neurological damage. At the time, it was widely believed that once certain neural pathways were damaged, they could not be repaired or compensated for effectively. Over time, however, through persistent research and clinical trials, CIMT gained evidence-based support and has become a recognized therapy in neurorehabilitation.
My point is that we should not build a cult of personality and take everything an "expert" is saying as absolute truth. He is right about many things. He could be wrong about some things as well. That's not a bad thing. That is how progress is made.
There is research being done by those who have analyzed nomadic tribes and they found high levels of ADHD like characteristics in those tribe members. The study noted that the traits associated with ADHD, such as impulsivity and a short attention span, which are often seen as challenges in modern structured environments like schools and workplaces, might have been beneficial in the unpredictable and varied challenges of a nomadic lifestyle.
Just like when you are blind or lost an arm. It's not a problem because society is build around the assumption that people have two arms, it's not a problem because society is build around the assumption that you can see. We should help people to deal with this issues, but saying society is the problem is the wrong way to think about it.
In fact, here's a quote from Chapter 1 of Hallowell's book:
>In the decades since that time, research has ballooned. Probably the most up-to-date and definitive account of the history and current state of the field is to be found in a book written by one of the great researchers in the area, Russell Barkley; currently in its third edition, his book is entitled, simply, Attention Deficit Hyperactivity Disorder
Maybe their tone is slightly different, but their descriptions of what ADHD is (not a society problem) and the solution they offer (lifestyle changes and medication) are pretty much the same.