This is silly wokeism interfering with the proper capitalist response.
Better to stock cruises with ivermectin and chloroquine that they can sell to anyone who gets sick. It would be a lucrative new revenue stream to offset their pandemic losses. Just make sure there is good med evac airlifts and let people make their own decisions on what they are willing to live with.
If someone is weak enough to die from an imaginary virus, there are much greater dangers to consider when cruising.
Why stock cruises with ivermectin and HCQ. Most of the time the cruises would like their customers to come back instead of die. Treating disease with these meds are largely ineffective. Perhaps banking monoclonal antibodies would be smart
Additionally if the cruise line demand proof of vaccine its an individual decision of a business. They are entitled. People are entitled not to cruise if they object. There is the real free market answer