The saying is that a force multiplier turns 1 battleship into 5 so we can mothball 4 other ships.
The equation works the other way. Destroy 1 ship and it’s like sinking 5.
There will come a day where the Russians and Chinese get cocky and they will have the punch to not back down.
The calculus for sinking a US Warship at Sea always comea down to this:
Are you willing to trade Nuclear Weapons with the USA?
So far, nobody is.