I think for outreach, hammering on executive disfunction is the best way to go. It's the most alien to the neurotypical, and it most clearly paints ADHD as a disability, rather than a mere personality trait. And rather than talking about failing to focus on things you don't want to do, talk about failing to focus on things you want to do, but simply fail to produce incremental enough satisfaction to remain focused on. Like, before I got medicated, I would want to watch a movie. I would enjoy watching a movie. But you better bet I'd be getting up, checking my phone, going to the restroom out of sheer restlessness, etc, instead of doing the thing I wanted to be doing: watching the damn movie.