To be clear, I don't mean just telling a child they can blame ADHD for their difficulties. Rather, helping them recognize that ADHD is often the reason behind their struggles with certain things and encouraging them to ask people around them for reminders, support, or ways in general to create accountability.
For example, my first job, a paper route when I was ~14, was a nightmare until I asked a friend to do his at the same time as mine and pick me up. Even though we had separate routes, just knowing I had to be ready when he arrived created enough accountability that I didn’t struggle with it as much, and it didn't require me to rely on my parents to impose that structure on me.
Imposing structure is helpful, but it only lasts as long as they have someone imposing it. Ideally, they learn how to build that structure for themselves before they have to navigate everything on their own.