As a heuristic, assume that it is never the right question to ask "Is ___ real?" Asking how it is measured, what kind of effect it has, whether the effects are meaningful, how it can be explained, whether there are more appropriate labels, what kind of alternative explanations exist, etc. Asking whether something is "real" fails even when talking about fundamental physical phenomena like gravity, math or consciousnes…
With all due respect, I have done my research on ADHD and still couldn’t come to a conclusion. The opioid crisis was a manufactured crisis by the greedy big pharma, right? Looking at how anyone and everyone is being prescribed stimulant medicines these days, I have my reservations about this disorder
Yet it is still more and more discovered to be a more widespread issue than thought.