[JohnBooty]

A typical ADHD complaint is that the "hyperfocus" happens but the problem is that you can't choose what you want to focus on.

  Or maybe these are in fact 2 different disorders?

Sure. Even with our woefully incomplete understanding of things, there have been recognized subtypes of ADHD for quite some time, as well as recognition that there are a great many things (situational depression, clinical depression, etc) that can affect one's focus.

And yes, diagnosing little kids with ADHD and giving them medication sounds horrifying to me.