I disagree. It’s not clear from the context. People often generalize their experiences to think they apply to everyone. With psych meds, this is very common. I don’t expect a PSA, just a recognition that “they work” cannot be stated as an absolute. I don’t know what you mean by access being mediated by layers of professionals.
You have to first see a doctor who will prescribe the medication followed by a pharmacist.
I don't see a claim by OP that their experience generalizes absolutely. I'm also having a hard time seriously believing you don't think people are aware that folk can have varied reactions, people become aware of allergies as a concept usually well before psychiatric medication.
Just to be clear - I don't mind you adding in that additional context/reminder, I think additional perspective like that is frequently helpful, but I do resent you demanding others add it in your stead like they've missed an obligation or made a mistake.
In the developed world, yes. In much of the world (perhaps even most of the world) you can simply walk into a small local pharmacy and buy pretty much anything. Antidepressants, valium, antibiotics, whatever. Only uppers tend to have stricter controls, but I've heard you could find them with a bit of legwork.