Yes, but CCP can just as equally say that a handful of people from your country not being able to afford their game isn’t their problem either.
I’m sure their staff has already done the calculations, and figured out that offering regional pricing wouldn’t lead to increased revenues. They’re a business, after all. Making money is quite literally their primary concern.
Argentina is a very special case. It wouldn’t necessarily be that simple (or cheap) to start an Argentinian front for your EVE accounts. Besides, CCP is likely to correct this pricing discrepancy at some point, making the effort to go through Argentina to play EVE pointless.
It feels to me that you’re unduly lashing out at Argentina for having lower prices than your country, but this isn’t by intent. They’re not being given preferential treatment over you.
On the other hand, in countries like Russia or China (places that have roughly similar purchasing power indices compared to Brazil, and would benefit from regional pricing about as much as Brazil would), it would be trivially easy to set up account farms using proxies and widely available payment methods with very low fees.