Hyperfocus is not about "focusing intensely on your job until you perform it at world-class level". The hyperfocus of ADHD is essentially random and driven by the very same inattentive "monkey mind" that's the defining feature of ADHD itself: it's not necessarily targeted to a productive task.

Those who face this issue can of course try to "gamify" their upcoming tasks to themselves in a way that will hopefully steer that focus in desirable directions, but that's not always easy. The monkey mind also resists ongoing habit formation, which is the tool most non-ADHD folks would generally resort to in order to effectively manage their overall schedule and just be more on-task.