It's very difficult to explain hockey to people in our own world, much less a new one. There are so many inconsistencies in every game, particularly the calls made by refs. Whether it's reviewing offsides, or calling a goal off for goalie interference, refs never seem to follow any precedent, and the calls are made very inconsistently.  I imagine it's very difficult for a new fan to try to understand the game, which is going to be even harder to make happen when describing to a new world. I suppose you have to start with the basics. It's just people moving on ice with tiny blades on their feet. While trying to whack a rubber puck with a long stick into the other team's net. Not out of the ordinary whatsoever. When you take a second to think about it, hockey is such a strange concept that it would be impossible for people in another world to understand.