Not all.
Carriers tend to have internal hangar spaces, repair/loadout spaces, machining capability, assisted takeoff/landing systems on the flight deck, etc.
To “carry” the aircraft and expect them to perform their roles, the carrier has to be a mobile light airfield and not just a deck to land and take off from.
Edit: Not to say they can’t sail or don’t with any of them on the flight deck of course, but that’s maintaining a certain level of readiness that has some posturing inherent. I guess that’s true for all military readiness doctrines.
Same, but (at least in my case) you can’t ever listen to that bastard brain and do more than a small amount. The margin is thin and the prize of folly is being up at 3AM, yawning sleepily, but awake.