They barely beat Iran, Nigeria, Switzerland and Belgium with both so what says they'd have beaten Germany. What says they WOULD have won against Germany? A bit like saying Brazil would have won the whole thing with Neymar, which they wouldn't. Best team won the World Cup.
Because the Germans didn't beat the Argies by much, they gave them plenty of chances and someone like Di Maria would have made a big difference. Let's not talk about Brazil, bro.