I havent really fully analysed the reasons and strategy, but I think the Pumas made just 2 kicks in general play in 80 minutes of rugby against Ireland. They relied totally on promoting the ball by smashing across the advantage line, getting go forward then going wide to go round the Irish. It was all done with ball in hand.
In the 2nd half when Ireland stiffened up the defence and the Pumas were unable to make any progress with ball in hand they still firmly resisted any temptation to kick.
I suspect they wanted to avoid as many lineouts as possible and had also identified a softness in the Irish defence - but I think if they stubbonly refuse to kick against australia they will get a different outcome, they wont get across the advantage line nearly as often and if Pocock is back they will be turned over more often.
I suspect it is something Chieka and the coaching staff will be looking at closely.
None the less it was a great game from the Pumas, they held their nerve when the game turned and found a way to take it to another level, almost AB'ish in their approach.
The Wobblies will have to play very well to beat them, hopefully now we have got our 1 bad game in the world cup out of the way!