What data is there to suggest that going to hockey games was "high risk behaviour"?
But if after every hockey game 20 hospital beds get used up, that's as risky for the health system as allowing a restaurant to serve uncooked chicken for an evening.
Do we need to call in military hospital ships? Maybe we do stuff that reduces communication of disease, reduces driving to reduce road accidents, etc.
Where I live it was communicated more than once, “avoid doing riskier things this holiday season because the emergency services you expect to be available may not be.”