Well, the Chinese magazine is misreading most of the situation in the South Cone. Chile has a modern air force because of tension with Peru, past tensions with Argentina and the fact that by their constitution, a percentage of the copper revenue must be spent on defense.
Brazil is modernizing its air force because the Mirage 2000 and the Northrop F-5 Tiger IIs, which made up the backbone of the combat aviation are simply too old and expensive to maintain. Of all the possible planes Brazil could have bought (F-18, Rafale and JAS-39 Gripen), Brazil opted for the least expensive one. And the old fighters will not be replaced by the new ones one a 1:1 ratio. The Brazilian air force will actually shrink in numbers with the acquisition of the JAS-39. Also, another significant driver is the fact that Venezuela has armed itself with an incredibly powerful air force and the political future of that is extremely uncertain, which makes the Brazilian military nervous.
But yes, I think the Argentine military's primary motivator in this acquisition is status. The planes currently available for the Argentine combat aviation are completely obsolete, well past retirement age, and in the case of a conflict, would be little more than flying targets. Argentina's top frontline fighter is the MIRAGE III, a plane from the 1950s that has no sensors or modern weaponry. Also, they are so old that flying them is actually extremely risky for the pilots. But once they are retired, Argentina will have an air force that is equivalent to that of Bolivia and Paraguay. It must be really painful in terms of pride if you consider that this was once a nation that had an air force that outclassed by a wide margin, all of the other South American air forces COMBINED.
Since the Chinese are accepting soy as payment, the FC-17 would address the military's desperate need to appear somewhat relevant in the region. It is not a great plane, but at least would maintain Argentina's status as a country that has super-sonic planes on its air force.