This so much. I rarely attempt to communicate the experience of ADHD because it's rarely worth the effort but one of the times that I did to a good friend I was met with an affectionate "so you're a bit of a retard" and it's hard to argue otherwise.
The best I can come up with in terms of analogy is manual focus (like on old-school camera lens) vs. autofocus
* Manual focus may not be very sharp, but you can change it instantly, and get within the ballpark every time.
* Autofocus is very sharp... but not necessarily on what you want to capture. If it's not shiny enough, autofocus never locks in on that subject. If a bird flies past the window while you snap a photo of the blackboard, it will focus on the bird, and the blackboard comes out blurry. Since it's automatic, you can't just focus where you want to; you need to trick the circuit to work properly.
This so much. I rarely attempt to communicate the experience of ADHD because it's rarely worth the effort but one of the times that I did to a good friend I was met with an affectionate "so you're a bit of a retard" and it's hard to argue otherwise.