So they put a paper ballot with an RFID chip inside into a machine which then puts your vote into the chip, then you drop the ballot into a box? How is this any different from a regular paper ballot?
That said, this system prevents chain voting (a mechanism to make sure the votes that parties buy from low-income people are not changed).
The machine also prints the vote on the ballot, and because of the known bugs in the system people are still counting them by hand.
And even if they address that particular bug, because of the inherent nature of the political process, parties' representatives will always want to count the ballots by hand to prevent fraud.
EDIT: As of this moment there is no way an argentine political party would accept black-boxing an election.