Regarding the omicron lethality, once that is no longer a hypothesis but a validated fact, then the restrictions can be lifted. That moment is not now AFAIK. I am fairly sure the Canadian health officials rather want to play safe and be overly prepared than be surprised in the same way than Italy, Spain and UK in 2020 (disease had already penetrated deeply to population).
They should have postponed the tournament OR take harder actions to make it a real bubble, just in case. Open tournament in the middle of world wide surge ... why didn't they calculate this scenario.