Sadly a pattern not unique to (child) psychology.
Some years back i heard about a guy that died from heart attack, in hospital, because he didn't manifest the symptoms the staff was trained to look for.
And more recently quite a number of core literature is found to be based around men in their 30s and not much else. When different age groups and gender gets investigated they find that symptoms differ.
She made her case pretty well. There is a stereotype about how ADHD manifests. This stereotype is based on how boys with ADHD generally manifest their symptoms. However, because women often manifest different symptoms from this stereotype, they go undiagnosed.
Yes, these lack of recognition of symptoms can also happen to boys that don't manifest in this "typical boy fashion".
I dunno I'm typing out a bunch of words to try to convey to you how silly and defensive you sound without breaking "HN decorum."