The "neurodiversity" viewpoint here is that what we call "ADHD" is part of the natural variation in how human brains work, and that it's a category error to think of it as a malfunction to be repaired, but rather as a difference to be accommodated. That accommodation may or may not be via medication and therapy, but that shouldn't necessarily mean that the underlying neurological state is a diseased one.
A good analogy would be height: a person who is several standard deviations from the mean will face challenges in life that require various forms of intervention, but we don't generally think of them as having a _disorder_ unless there's an identifiable biological cause that usually has other effects.
Another good point of comparison is vision. We can accurately measure vision and create medical devices to correct unwanted variation. As someone with myopia, I find it to be only slightly medicalized -- going to get an eye exam doesn't feel much like visiting a doctor, and people don't tend to talk about it as one does a medical condition. I imagine that if we were able to make a similar kind of standardized assessment of whatever neurological basis there is for ADHD, we would consider medication for it more akin to a stepladder or a pair of glasses (or even an antihistamine) than a treatment for a mental illness.
A good analogy would be height: a person who is several standard deviations from the mean will face challenges in life that require various forms of intervention, but we don't generally think of them as having a _disorder_ unless there's an identifiable biological cause that usually has other effects.
Another good point of comparison is vision. We can accurately measure vision and create medical devices to correct unwanted variation. As someone with myopia, I find it to be only slightly medicalized -- going to get an eye exam doesn't feel much like visiting a doctor, and people don't tend to talk about it as one does a medical condition. I imagine that if we were able to make a similar kind of standardized assessment of whatever neurological basis there is for ADHD, we would consider medication for it more akin to a stepladder or a pair of glasses (or even an antihistamine) than a treatment for a mental illness.