It makes perfect sense from a strategic standpoint to move the CV into safe waters if you do not own the port. Keeping it "in play" will just get it sunk and your country loses the CV to the enemy. Let me restate, it makes absolutely zero sense from a strategic standpoint to keep the CV in play.
This entire thread is just a furballers vs win the war's never resolving argument in disguise. Furballers think the war is stupid and have no respect for the win the war guys right to play their way, within the parameters of the game, so they break the rules to get even.
You have to take the good with the bad, furballers. The war creates lots of fun in the MA. Do you like engaging bomber formations, missions, and defending bases against attackers trying to capture the base? If so, then you do enjoy the war aspect of the game. To cry about certain negatives of it that aren't to your likings yet eating the rest up with a spoon is hypocritical, and you should just go over to furball lake and fly in the endless furball. No bombers, no base capture, no strategy, nothing but fighting endlessly to your heart's content. If that sounds boring, then you are really just fooling yourself of what the MA is really about.