A hotel can tie up the resource of 100 places to live in temporarily inside one single building. Airbnb spreads that out to 50-100 separate places to live in. There's a difference, don't you think?
Empty hotels have the same CPVID19 effect as empty AirBNBs.
In fact, empty hotels are serving very important roles right now around the world housing homeless and quarantined people and travelers.
Finally there is no comparison between a hote and a cruise ship. Travelers in hotels, much like Airbnbs, are all back at their homes. The problem with cruise ships is that they cannot easily get back to wherever they’re from.
For C19 unsure what's better. Cramped place or randomly distributed. I hear cruise ships are not very popular at the moment.