Carriers are large...very large....and just as living in a City you only go to certain places that. you need to visit....work, home, shopping, the Doctor, Dentist, Library, Church or barber shop..
As there are sensitive spaces aboard....weapons storage, nuclear power plants, classified spaces and material....and for the Other Ranks....there is Officer Country that is out. of bounds
A large portion of the personnel aboard are not part of the Ship's Crew but are embarked Aviation Squadron personnel that spend their time on the Hangar Deck and Workshops or on the Flight Deck thus have no reason to "know" the Ship as do the "Crew".