Honestly, I don’t think you have the right to try to invalidate others experience with it.
It’s not one size fits all, it’s not the same for everyone, and for some people, there are coping mechanisms that work for them and not others.
Yes, it’s frustrating to see ADHD used as an excuse by those that don’t have it (ie. “Oh, I’m so ADHD today!”) but that doesn’t mean that those who have found ways to cope and operate within a neurotypical world deserve to have their condition invalidated by those who believe they have it worse.