You're talking nonsense, the players who you quoted, only Castrogiovanni and Parisse would start from the beginning a game for the Pumas. The Pumas have had better players than Orquera, Aguero and Canale. As Pichot, Hernández, Albacete and others who have played for the Pumas although sport isn't professional in Argentina.
Furthermore, the non-professional sport in Argentina isn't important in this matter. Argentina's soccer team, is a product of European football leagues, not the product of Argentina Football League (AFA). The best Argentine footballers play in Europe: Messi (Barcelona), Sergio Aguero (Manchester City), Di Maria (Real Madrid), Gonzalo Higuain (Napoli). Like the Pumas, the best players play in Europe: Albacete (Toulouse), Ayerza (Leicester Tigers), Fernandez Lobbe (Toulon), Juan Martin Hernandez (Racing Metro), Gonzalo Camacho (Leicester Tigers).
The best Argentine players play in Europe, if Castro and Parisse were not recruited by the Pumas scouting while they played in Argentina, is the fault of the UAR managers.
Cheers