^ I think that's just the writer's opinion, I assure you that the NHL wouldn't consider the potential gate receipts from a game at the Big O to be anything remotely resembling absurd. AFAIK it comes down to the reason JHikka mentioned, there are concerns about the structural integrity of the Olympic Stadium roof when subjected to snow loads. That was part of the reason that RIO was stumping for yet another injection of vast sums of money into Olympic Stadium.
That said, one would think they could get away with having it in October as well, when heavy snow is fairly rare/unusual?
BTW that pic tells you everything you need to know about stadium games... that "view" of the ice was over $100, probably over $150.