Because despite the truth in the moment, as a republic we as people still need to believe that our actions are justified to continue our policies, and you don’t have to be lied to believe it, even if you personally end up on the side that it isn’t justified. We still want the approval of foreign nations, even if we’re comfortable with a less than 100% approval rating. Our interests do include human life, even if they’re sailing under a foreign flag on a civilian ship. We would prefer civilian ships and not have to arm themselves to the teeth ready for an adventurous voyage to get across the water without being harassed by hostile actors. In other words, policing actions are a deterrent to greater hostilities.
