I can't speak for anyone else, so I will just speak for myself: I am a college student, and my normal experience is having to fight tooth and nail for capturing every deadline, every little detail - the actual "difficulty" of the class is not what makes it difficult for me. I have had to construct systems around my symptoms: an "inbox" notebook for deadlines, a complex to-do list system, a system of pages upon pages where I break down large tasks into smaller ones, because only then will it be possible to get them done. A sleep tracking notebook, a notebook for exercising, a time blocking journal, and so on. I manage to get by, and I get good grades, but every morning I wake up prepared for war. I am in a permanent state of playing blitz chess against my mind's most insatiable distractions - a hard problem to solve with a system, since the only thing making me use a system is myself. I don't use TikTok or any other social media, which has garnered more than a few odd looks from my friends over the years, but frankly I consider it completely necessary.
I don't think about my ADHD as a part of my identity, or a part of my personality. It is, however, a disorder. Unless the world magically reconstructs itself around these symptoms, this will continue to be the case, because I simply do not have the same abilities as the average person in any given task of attention or impulse. Of course, the "average person" doesn't really exist; everyone has their own issues, their own reasons to wake up prepared for war. Everyone has something going on that deeply concerns them, whether others know it or not. But, for me, ADHD would not make sense if it weren't a disorder. It is a constant disabling factor in my life. Given that ADHD is one of the most well-researched and scientifically demonstrated neurological conditions, I doubt it is going anywhere anytime soon. But my ADHD is not a normal way to interface with the world. It was never "solved" with positive reinforcement from teachers, nor is it restricted to the classroom. Such a fundamental issue is not solved with basic accommodations - there is no silver bullet against the monkey in my head.
All of that being said, this is just my own experience, and my own thinking. I'm sorry for the long wall of text, but a lot of these discussions take the person out of the disorder, and consider broad swaths of the population according to the commenters' personal sociological constructions of the world, so I wanted to contribute my own individual experience here.