What are some lesser known depressing facts/statistics about ADHD that you know?

As the title reads. I often deal with family (that I still live with and depend on) pushing me saying ADHD can't be proved to be that big of a deal in a person's life, which is both a lie and invalidating. I still don't know if I want it just for having more to defend myself with next time I'm cornered or also for my art, but yeah, either way I'd like to hear what you guys have. Thank you in advance ^{^}