I think you're overstating these two sentences. He was clearly very curious, but that does not mean he had ADHD. I mildly agree with your sentiment insofar as

I think you're overstating these two sentences. He was clearly very curious, but that does not mean he had ADHD. I mildly agree with your sentiment insofar as it would be interesting who did or didn't have ADHD, but don't you think it's a bit trivial? Furthermore, I believe it sets a poor precedent for all the people that tell themselves they have ADHD when really they just need to improve their self-discipline. Sure, there are people out there who have a lot of difficulty focusing, but no, I do not believe it's as rampant as we like to tell ourselves.