Are you saying it is not?

Given we do not know what causes ADHD, and there is disagreement over whether it is a difference or a deficiency, its quite hard to have any definitive answers about it.

Given symptoms of ADHD include things like being better in emergencies and being able to to focus more intently on certain things my view is that it is a difference that society is unwilling to tolerate and is therefore treated as a problem to be fixed.