This is simple logic that can not be understood in the economy academic classrooms.
Road accidents did not remove road travel. Aids did not remove free sex among adults.
Every new risk that comes up has its own cycle of hightened fear to the coming to terms with the reality.
The ability to adapt and adjust the thoughts is a trait that human beings have which helps them to stay alive.
The power of imagination is a boon that has helped humanity establish their superiority over all other species on the planet.
Cruise lines will continue to operate and people will continue to like those experiences and find ways to do it with Covid19 around.
How soon or late can be a question but imagining a world without cruiselines is not realistic. People who have spare money and hoping to make a killing or always going to be around.