I told my doctor I had already been diagnosed with ADHD because I had a strong suspicion I had it and wanted to see for myself if the medication helped (it helped massively). I think medicine should be accessible for patients who need it but I don't know how to avoid large amounts of patients then taking medications for the wrong thing, which would probably happen if it was a free-for-all. It kinda comes down to the question of having the personal freedom to hurt yourself doing something stupid, which is a balance (a little of that freedom is good, too much probably bad). All-in-all I lean toward the current system of using on experts to make the final decision. Still, I would be really pissed if a doctor prevented me from getting stimulants for something I believe I need, so I am not 100% satisfied with the current system either.