cruise ships crew

An article mentioned that there are 1000 crew members on the Grand Princess cruise ship. I thought that number must surely be a typo; maybe they meant combined passengers and crew.

So I checked how many crew members a cruise ship normally has:
https://www.cruisewatch.com/top-10/ships-passenger-crew-ratio/

According to that page, the minimum passenger to crew ratio is 1 to 0.1 (ie. 1 crew member per 10 passengers), but that is only one ship out of almost 200 listed. Most ships listed have at least a 1 to 0.3 ratio, and several even 1 or more crew member per 2 passengers.

Those numbers are not even per room, but per passenger. What do they all do? Clean, cook, activity guides, ship maintenance, actual navigation and such...

Considering that crew members are likely aboard ship for months at a time, they won't all be on duty at the same time; they need days off as well as having different work shifts. So that must increase the number of crew that are necessary.

But still, I had no idea. For a large ship, I would have guessed a few hundred at most.