However, it is an interesting article if you ignore that bit of bluster. The amount of overlap and traits commonly associated with ADHD and autism.
That folks with Autism and ADHD may have large portions of their symptoms occur because they focus too much on some specific things, to the detriment of others - like emotional well being/regulation - can still be falsifiable (better than most psychiatric theories for sure!) and useful clinically.
Personally, it lines up with what I’ve seen and experienced.
That there is another (perhaps chemical, or brain structure) theory too doesn’t necessarily change that!
Just because it doesn’t describe 100% of situations or work 100% of the time doesn’t mean it couldn’t be shown to produce useful predictions and work or not.
And yes, that isn’t particle physics type falsifiable, but it is medical treatment falsifiable. Kinda. Newtons theory never predicted Mercury’s behavior, but was still super useful eh?