Funny how omitting a few details makes it seem like it deserves the title. While most of what it says is true, it fails to talk much about the "import restrictions" that it briefly mentions:
"Amazon does not have an Argentinian site and import restrictions make it a bureaucratic nightmare to purchase books from international internet sellers"
This problem is not only one for international sellers, but for international publishers. As a publisher these days it is almost impossible to get into Argentina. As an Argentinian bookstore it is prohibitively expensive to bring books from foreign publishers. That's a huge problem and very far from what the linked text paints.
You might be forgetting another source: used books. There are literally millions here. Used-books shops are everywhere, sometimes there are entire streets taken by them. You can find anything here, and everybody commutes about an hour from home to job, the perfect time to read a book.
Also, anything more expensive than a book (tablet, e-reader, phone) will get stolen and you beaten, so settle for the old book.