I think that's probably right in neurotypical folks! Maybe I wasn't clear, but I exhibit what people characterise to me as a remarkable ability to focus and remarkable ability to not focus. Huge deviations from the mean in both directions!
The other thing to remember is that whilst ADHD is likely overdiagnosed, that doesn't mean that many kids who have it will simply not respond to K12 education as an environment which conditions them. This is not something which can be corrected with hard work and thought, although people who do not experience ADHD often (understandably) say things like "just sit still!" or "don't interrupt people it's rude!". The crux of ADHD is that it's a neurodevelopmental disorder and a disregulation of dopamine and chemicals designed to help regulate executive function, focus, anxiety, etc. It is generally not possible to see significant results with therapy, although there is some limited evidence that early intervention through medication has long-lasting effects in children who are able to move off medication in the medium term.
The other thing to remember is that whilst ADHD is likely overdiagnosed, that doesn't mean that many kids who have it will simply not respond to K12 education as an environment which conditions them. This is not something which can be corrected with hard work and thought, although people who do not experience ADHD often (understandably) say things like "just sit still!" or "don't interrupt people it's rude!". The crux of ADHD is that it's a neurodevelopmental disorder and a disregulation of dopamine and chemicals designed to help regulate executive function, focus, anxiety, etc. It is generally not possible to see significant results with therapy, although there is some limited evidence that early intervention through medication has long-lasting effects in children who are able to move off medication in the medium term.