Good and interesting article. It's a very important issue. I find it so sad whenever I hear of children being diagnosed with ADHD and prescribed mind altering drugs as a treatment, for what is basically an inability to concentrate in school or keep still.
There is also the stigma of being told that you have a 'disorder', which some people carry throughout their whole life. It can take many years for them to come to realise that there was really nothing wrong with them at all, but the system itself was the problem. It just doesn't suit everyone.
I also find it difficult to hold attention on one thing at a time as I have a very active imagination and a busy mind. Learning to make guitars has helped me to focus my attention and develop the patience and discipline it takes to finish what I started.
Most creative processes are about getting into the 'flow'. A child who is in the 'flow' should not be interrupted or distracted. It can be harmful. This is another problem with the school system, when everything is governed by time-slots.