Bob Viking is spot on. For 99% of the people this forum, their comments will be pure speculation..... well-intentioned speculation no doubt but speculation nonetheless.
Unless you've flown in the Antarctic. Unless you're familiar with the CONOPS down there. Unless you know McMurdo & Pegasus Field. Unless you know how fickle the wx can be. Unless you know how poor the forecasts usually are (it's a very big place with very sparse data). Unless you have intimate knowledge of the RNZAF's B757 SOPs & how their PNR/ PSR procedures cater for the inevitably sketchy wx forecasts on the ice..... I could go on.
Feel free to ask questions but perhaps think twice before passing sanctimonious judgement on the decisions & actions of a professional crew whose working environment you probably know very little about.