I guess if that stance is harmful then I'd think about why people are having that stance in the first place.
If somebody gets told "you have ADHD, a debilitating mental disorder", and then does well in life anyway, what exactly are they supposed to think happened? Why were we telling them they're messed up in the head when clearly they're quite functional? "Wow, maybe ADHD is good" seems like a pretty logical jump to me.
Mental health is an important topic, but it's still really wishy-washy. Sometimes I wonder how useful all these vague labels really are. I also got diagnosed with ADHD when I was an adolescent, and I almost feel like that diagnosis just made me do even worse at school. I'd be like "well I have ADHD so it's physically impossible for me to sit down and do algebra. might as well not even try."