“They are nothing more than floating petrie dishes full of germs.”
Same for planes.
Same for trains, subways, office building, dormitories, airports, office buildings, classrooms...you name it.
I bet we can buy a used cruise ship real cheap in the very near future. This is one of those issues that could have a profound impact on the cruise industry. Makes buying an RV seem attractive, so find a public RV company and buy stock.