Training for interoperability or planning for a carrier or two to be sunk?

There’s a first for everything…

The 1st 🇬🇧 F-35B jet lands on a Japanese ship. #OpHighmast #CSG25 pic.twitter.com/87Y0vICdu8

— UK Carrier Strike Group (@COMUKCSG) August 9, 2025

Everyone doing the "lightning carrier" concept is or soon will participate in the cross decking exercises with allies. My question is simple. Is this about interoperability or is it really about planning to lose a carrier or two?

During WW2 the US cross decked aircraft from one carrier to another due to battle damage or in extreme cases because one had been lost.

Fast forward to the 60s and 70s (Vietnam war period) you had aircraft land on the wrong carrier and it was met with humor and graffiti on aircraft.

Now?

I don't know if its technology or just having fewer aircraft deployed together but you rarely see such a thing on big decks (which brings up another point, the cross decking is only done with the F-35B, no other ally operates non STOVL aircraft from carriers except France).

The weird thing?  This all became a thing when the UK couldn't man the HMS Queen Elizabeth because the ship was ready before a full complement

of aircraft could be onboarded.  To save the Royal Navy face the USMC offered up some F-35Bs to fill the gap.

After that event it became all the rage.

So is this actually a useful exercise or just glorified motion to simulate a real war time capability?