Personally, I find a very strong link between my devices and my ability to focus, as they're the space in which I spaff my time. I do not believe myself to have ADHD, I believe that the machines I use offer limitless ways for me to lose track when I'm tired.
I'm deeply skeptical of pharmacological solutionism, particularly in the domain of mental health. A variety of drugs can be a boon, life-saving to many, but are over-prescribed and treat symptoms not causes.
With regard to amphetamines in particularly (we called it 'whizz' where I'm from, back in the day), we're talking about a class of drug that can cause dependency, problems with sleep and sex, anxiety and plenty more. I would not say they're not without side effects in the slightest.
Sure, great if this sort of stuff helps, but I find the "just get a diagnosis" line utterly inadequate and borderline disturbing.