I'm going out on a limb and saying the UM hockey team, which has an embarrassment of riches, isn't cancelling games just because.
Remember when it was a big deal when OSU had the #2 and #3 pick in the NFL draft with Chase Young and Jeff Okudah. Michigan's hockey team had the #1 pick overall, to go along with the #2 pick, the #4 pick and the #5 pick. They all play for Michigan right now. They also had the #24 pick too.
I don't follow hockey much, but if they are cancelling games, my guess is, it has to do with guys on their team playing in the Olympics, coupled with Covid. Remember hockey only has 16 scholarships I think. If 1/3 of those players are at the Olympics -- it doesn't leave you much room to lose players.