Pensador, it might help to read the articles before you cite them.
That article specifically refers to psychologists, not psychiatrists. Quoting your article:
Just like in the United States, psychologists cannot write prescriptions. The therapists I spoke with said, in their view, Argentine therapists are less oriented toward medication.
Meds are not passed out like M&Ms here as they are in the US. For proof, just check the various posts on this forum by recent arrivals from the US trying to get their meds; it's much more complicated here than there.