> It seems like there's a reason evolution chose for ADHD to exist.
Well, evolution is not an actor. It didn't 'choose' anything. It's just that people (organisms?) with ADHD have not failed to reproduce in the past, so it still exists.
> organisms with ADHD have not failed to reproduce in the past
Yes, that's the real insight. You can be terribly unsuccessful by society's standards and yet immensely successful by evolutionary standards.
If you're broke/in prison/homeless/addicted/(whatever else you want to include) with 6 kids, you're evolutionary more successful than someone who has it all put together with 0 kids.
Yes, we have an entire part of the language for talking about what actors do. And we have nothing at all to talk about how non-acting structures mold complex systems.
Well, evolution is not an actor. It didn't 'choose' anything. It's just that people (organisms?) with ADHD have not failed to reproduce in the past, so it still exists.