At least they aren't cutting up the Jumbo Jets and just storing them in a dry place where they won't rust away like they are the Cruise Ships

 Cruise ships torn apart after coronavirus sell off

• Airplane parking lot in middle of Nowhere in Austr...

There are places in the California and other deserts where they are storing planes too. You need a special climate where the aircraft can be maintained where it doesn't almost ever rain which is a desert place in various places on earth to store jet aircraft long term and keeping them maintained.

But, the Cruise ships have to be used or sold for scrap for a variety of reasons and it likely is going to be at least 2 years before people go on cruise ships again for a variety of reasons worldwide. I think part of it is insurance for these huge cruise ships is prohibitively expensive and only possible when many people are going on cruises. So, it makes good business sense to cut your losses before you go bankrupt by selling the ships for scrap so you don't have to keep paying for the insurance you need to keep them afloat.

It's just another part of the worldwide sadness caused by the Coronavirus pandemic. 

Whereas Jet passenger planes can be stored in deserts away from rust which you have to deal with around oceans or wherever it rains much. So, likely it is the rust and the type of insurance you would have to carry all the time on a cruise ship which forces people to sell them for scrap now.

Also, maintenance and security for a cruise ship and having a berth for it somewhere would be much more expensive than a passenger jet I'm thinking.

When they are picking up passengers and dropping off passengers they don't need to pay for a berth for very long at one time. Whereas now they would have to store these cruise ships for a couple of years and that would bankrupt almost any cruise ship company because of all the money going out and none coming in.

But, imagine the hundreds or thousands of cruise line personnel worldwide out of a job right now!