Try telling cruise ships to turn off all other lights but nav lights.
Let’s talk about the reality here, not your perception of a how it should be.
So your war ships are fighting battles in Tokyo Bay and Singapore Strait, or other generally peaceful places??
When was the last time an American warship was hit by an incoming missile??
How many American sailors have died because of collisions with non-armed friendly merchant ships?
If everybody followed the COLREGs and made their presence and intentions known to everybody else, the chances of getting in front of another ship would be greatly reduced.