I absolutely love this take and I can relate.

-- humor dissection to follow --

In reality though, it's possible, but Occam's Razor would have us disagree. And a pragmatic take on all that would be: does it matter, especially if treatment and coping mechanisms also work in both cases?

Also, as a fellow ADHD-er I strongly believe that diagnosis is not an excuse; it merely explains how and why. Responsibility still lies with the afflicted regardless, with an ethical responsibility towards others for those that are self-aware.