It does seem like Iowa has a lot, but you could look at a number of other programs and they have had their share. Perhaps not as highly publicized? For instance, Minnesota always seems to be heavily taped up at the end of the year; Penn State has had plenty, too. (Nolf, Cassar, Kerkvliet, Berge, Berge, Starocci, Howard, Howard, Rasheed, Suriano, etc.) (Maybe we don't think about the PSU injuries as much because they have been doing more winning as individuals and as a team?) Cornell as well.
Maybe we are seeing more injuries due to the extra (Covid) year? Another year of D1 wear and tear is probably a lot for many of these kids.
As far as the all-star meet: Is it like in years past? In the past, the matches did not count toward seeding. If that is the case, why bother pushing an injury?