Last I checked it still is a choice. No one is holding you at gunpoint forcing you to get the vaccine.
Choices have consequences and in this case it is that you cannot get on the ship at this current time. As someone else stated a cruise is not an entitlement. You may enjoy going on one but it is not a "right".
I do not personally feel at risk but I have zero issue thinking beyond myself and doing my part to at least attempt to keep others not so fortunate from getting sick. I know a 20 something and 40 something who died this past week-they had no other health issues. Probably could have been prevented save for this ignorant mentality.
