Even if you can “address” underlying condition, you are unlikely to replicate effects of medication fast enough, it changes all your actions. So with the pre-existing and likely since early life condition body isn’t habituated to the same tasks efficiently as “normal” person, meaning that struggle to perform work or regular chores after stopping medication might be caused by mere fact that appropriate habit of performing as if its nothing or a tiny nuisance, wasn’t formed. It takes all early life and more for people to form such behavioral patterns and given state of general population it isn’t something that many “master”.
That’s why some people can stop ADHD medicine after a period of time, because they simply made it through major struggle to form habit of working/doing something that was previously so mentally challenging they couldn’t fathom concentrating on it. Like studying which is often taught badly and many children have a hard to time to form studying habits which drags further on in later life.
And conversely some people who take it continuously do so because they need to have their effects on all of the things they do in life to function.
So basically you might stop experiencing true symptoms, but the “wiring” that makes every tiny thing “doable” without procrastination might or might not be there. Brain being connected in a certain way isn’t a natural condition, but acquired one, so that isn’t symptom of present ADHD, but sort of its consequence while underlying issue may or may not be present. Medication bypasses the lack of concentration and somewhat issues that prevent wiring, because ADHD drugs usually increase neurogenesis.
TLDR: Check how many areas of your life are significantly affected by ADHD and improved by taking prescription drugs. There are a lot of reasons that reduce ability of a person to do certain tasks, but even finding those causes might be a challenge.