There's definitely some complacency when it comes to believing being vaccinated and boosted means you won't get sick enough to need hospitalization and therefore, imo, people are choosing not to mask up on ships. I saw very few people in the terminal wearing them and it was inevitable people would leave the ship with it. Spend 90 minutes sitting in a theatre with 200+ people, almost all unmasked is going to lead to cases just given the nature of how the virus is transmitted.