"Incapable of working in a modern corporation." Holy hell man, this is some 1950s era able-ist nonsense. "Oh no, they have 'something wrong with them', it's sad that they'll spend the rest of their lives in a living hell they can't escape, unable to contribute or function in society."
I can point you to a zillion people with ADHD who hold high positions in modern corporations, and a zillion more who do excellent work. ADHD is just a different way the brain works, there are many highly effective coping mechanisms to deal with it. And ADHD does have some real benefits as well, such as hyperfocus and creativity.
Also, I should note that there are a ton of people who don't even know they have ADHD simply because they don't understand what it looks like, and they naturally developed coping mechanisms that allowed them to be highly productive. ADHD doesn't look like the cartoon pop-culture version its portrayed as. It's not like some uncontrollable child bouncing off the walls and unable to concentrate on anything.
For myself, I didn't realize I had ADHD until I was 40. Why would I suspect? I graduated college at 20 (with a degree in Mathematics), I learned about turing machines in high school on my own time, I read textbooks for fun, I love science and math, I can get lost in good books or studying quite easily. But those are, actually, signs of ADHD, which is a horribly mis-named condition, it's not about a deficit of attention it's about interest-based attention. If I'm interested in something then I can immerse myself in it quite easily, dedicate hours to study, churn through dense written material, iterate through "boring" repetitive tasks, etc. But if I'm not interested in something then forcing myself to do it can be like pulling teeth.