If a country can take the port and kill the CV then they would use it to attack another base creating more engagements, and more entertainment.
Lambo
As a strat player I'm all for hidding Cv's but not as a default. There are times to use them and times to push them to the back. The guy with "rank" should be able to see an advantage when presented and push the attack.
There is another side to the coin.
Players as a team have captured that port & Cv and guarded it on it's egress. Considering it's only strat players capturing Cv's I think they earned the right to park it up untill it's safe to move it up. Bearing in mind it's often a good source of conflict to stop the suiciding bombers getting it back when they get their port back.
I've been here long enough to whiteness all sort of scenario's with Cv's which see them sunk in quick time. Poor command by placing of Cv under SB or at PT spawn. Locking the command so it can't be turned away from bombers etc. I've also witnessed plenty of occasions when our fields are being attacked by a Cv and no one gives a dam. So much for the "it's about the fight" argument. Had that been a resunk captured Cv a few chaps wouldn't be best pleased.
All I can suggest is to reason with the "rank" player when the Cv's port is safe from capture. It should be pushed back into the fight.