This is only your perspective and not true for most of us, even in the slightest. Medicine only works to a certain extent. MUCH more work has to be done by the person themselves than just taking a pill. Sometimes it compounds with a habitual issue that needs to be corrwcted. For example with timers to let an ADHDer know when it's time to stop doing something mundane and do something more important or a Todo list that's featured prominently somewhere.

Brains are something that isn't fully understood by anyone yet and medical professionals are always researching how to manipulate the brain to behave in a "normal" way that society accepts. And that's just the thing, it's also a societal issue. Just because society tells us we should behave in a certain, narrow way, doesn't mean that way is comfortable or works for everyone. Matter of fact, I'd say a LOT of times, there needs to be more compassion, understanding, and compromises made by those without ADHD as to at least slightly compromise on certain situations. That way both parties could come to some sort of agreement that works for all of those involved.

Though if someone is refusing diagnosis altogether because "LUL ADHDMEMES" and it's affecting their lives and yours by proxy, it's an issue with that person and they need to seek some help.