People that specialize in mental health, psychiatry and brain research have concluded that ADHD is a diagnosable mental disorder. I'm glad they're doing that instead of trying to write books on rust or go.
More to your question, I think a lot of the common hesitance and skepticism is the result of stigma in the vein of anti-vax ideas. Some lay people think they know better than the medical community and won't hesitate to tell you their unqualified opinion. Consider them nuts. Try some treatments, read some books, work on your systems of support, and always remember it's REAL, don't be ashamed to struggle. You're not making it up. You're not faking it. You're not bad.
It might not be obvious to other people, but you just need a little help, like when someone breaks their leg or gets the flu. It's no one's business anyway, unless you decide to confide in them.