Hockey culture's toxicity has been in the news soo much in Canada lately (Google "EM hockey Canada"). Last year I found it hard to think about anything positive about hockey, the connection to misogyny & violence was too strong.
But HR is closer to that typical romantic escapism. Romantic leads are always a prince, chaebol, CEO, mafia boss, rich, intellectual, and extremely strong - so of course they're a mafioso with a heart of gold, or a philanthropic CEO, or a prince who acts justly. It's fantasy.
In HR's fantasy hockey is a vehicle for power and masculinity but it is also the main source of conflict. Like a romance where the mafioso is on trial for murder (and he did it in cold blood), or the prince is starting a war with the heroine's family, or the CEO is revealed to own a slavery-powered Emerald mine.
The real fantasy of HR is that even with hockey culture in the main 'antagonist' role, the show transformed hockey culture into such a weak antagonist (homophobia, head injuries) by not including the many, many additional negative associations (misogyny, racism, violence, cultishness, gambling issues, etc.). Then the antagonizing elements are presented as addressable/somewhat solvable (homophobia) or minimized (head injury is used for whump and then hand-waved away).
I don't know where I'm going with this... I guess to conclude that escapism is good sometimes, but too much is probably bad? And that I liked thinking about hockey positively for the first time in a decade*. HR's fictional hockey feels more possible to reform than any fictional monarchy... but they are equally fictional fantasies... and you're right that their narrative role is ultimately escapism & wish fulfillment.
* the show reminded me of like, playing pond hockey with my cousins, cheering for my crush in high school, and noticing the old guys who play road hockey on the tennis court at the park every Sunday.