Do you have any evidence that kids calmly saying "I'd rather learn useful things" are getting widely diagnosed as ODD? Anecdotally, that's exactly what I did in the late 1990s with my biology teacher. No diagnosis.
I don't think many of the kids that are ADD/ADHD/ODD are old enough to be aware enough of what's going on. The system is in no way tailored to them. Instead of those running the system reflecting on it's shortcomings and trying to remedy them, they instead suppose that it's the children who are the problem, not them.
