Exactly.
I could not read the OP's link because it is behind a pay wall but the Wall Street Journal had an article years ago about people retiring to a cruise ship. It makes quite a bit of sense for some.
The cost to cruise full time is expensive but so is a good retirement home in a retirement community. On the cruise ship,
- they have full time medical staff,
- a variety of restaurants to visit so they do not have to cook,
- people to clean their room,
- different and changing entertainment,
- travel to different ports,,
- changing scenery
- new people to meet as people come and go on the ship,
- no worries about traveling to stores and doctor appointments.
It can be a good thing for some people as long as their health is reasonable, or if they get lucky and just suddenly die. A good retirement community can provide some of the services found on a cruise ship, but not all.