Earlier quoted context omitted.
It's also a mistake to think that people are static. We can improve ourselves through the expenditure of effort. The reality is like the parent said: there are limits to everybody's abilities, but you'll probably have to work hard as hell to reach yours (not targeting you personally, the general case "you"). If you believe that your present abilities are all you'll ever have then you're wasting what could be tremendo…
Who said anything about not improving, the parent comment believes the ADHD sufferer is simply not working hard enough. He's trying to show him where his bootstraps are.
Unless you're living with ADHD, you really have no business handing out such directives. I was a hardcore meditator for years, arguably the crucible of mind training -- spent months of silent, directed attention in monasteries -- and despite blowing open the doors to some peak states, complete equanimity with all phenomena, and insight into some of the fundamental mechanics of desire and resistance, I was unable to hold any kind of job at all before I bit the bullet and medicated.
The decades of suffering I experienced because everyone around me was pushing this toxic narrative that ADHD was overdiagnosed and most likely a schema of my own failures could have been avoided if my parents just took a hard look at me and took me to a psychiatrist.
Armchair psychiatrists of Hacker News: please stop this irresponsible and dangerous public criticism of your interpretation of mental illness or the state of psychiatry.