I didn’t think I was disagreeing with Kevin, just quoting the existing canon per the Old Guard Rep.
The fleet is obviously a short term measure. A CVN is big and makes an excellent fortress against zombies - because even swimming zombies are probably not smashing their way through 0.5" of Special Treatment Steel hull nor are they climbing 5+ stories from the waterline to the aircraft elevators. But the flight deck is less than 3 acres and you can’t feed more than 30 people off of 3 acres. If you put hydroponics in every nook and cranny of the CVN you’re not increasing that past 300. And the CVN and any SSNs/SSBNs are the only ships in that armada with nuclear power - everyone else is going to run out of gas and therefore electricity relatively soon, so no hydroponics for the other ships.
The 2nd Fleet is a temporary refuge for Old Guard dependents for about 6 months, and then 95% of it is going to have to be shut down and the people pushed on shore to the hopefully fortified farm settlements. The CVNs are going to stay off-shore to provide a secure haven for the Old Guard leadership.
The Old Guard Rep, being a glorified contractor in zombie country, doesn’t know a lot of this and wouldn’t tell you, some rando he’s hiring to do dirty work, even if he did know. The Old Guard gets a lot of legitimacy for being the successor to the US government, but they lose a lot of that if they admit they’ve got no better solution to the zombie problem than dig some trenches, put up some barbed wire, and start farming - which is the same solution that everyone else has. They’re not going to casually admit that the 2nd Fleet is a temporary haven and the footholds are basically the same thing as the Refugee Center and the Tacoma Commune.