ADD/ADHD-PI is kind of a terrible name, but procrastination and a mind that never rests is a combination that while not unique, is quite uncommon outside "ADD type" brains/people.
It's not that a diagnosis is going to solve all problems instantly, but it can help avoid depression, burnout, and various secondary issues.
For me personally, I would say it brought me back to life. That's why I encourage others, because there was almost nothing left of me when I finally got the help I needed, and maybe I can help someone else take the same step someone once helped me take!