Well, either you have no clue about the conditions for crew on cruise ships or you don't understand how (well managed) retirement homes are run. Possibly you don't have a clue about both.
On all Covid impacted cruise ships I am aware of some of the crew had Covid as well and still have been required to sleep in communal cabins together with other staff and perform their duty. Ideal Covid breeding and spreading conditions
Never heard about a (first-world) rest home where staff needs to sleep in communal dormitories and are required to keep working when sick.
As well - instead of making ill informed comments I recommend you do some research on the Covid policies of NZ retirement villages ...