Looking back at this thread - there appears to be a lot of people who think a carrier is simply a floating airfield. Well here is a picture* of RAF Marham, with an outline of HMS
Queen Elizabeth for comparison.
All the things you normally get an an airfield are compressed into a small area, which is subject to the motions of the sea. Additionally the deck is liable to move as the ship yaws, pitches, and rolls. Everything has to be done in the finite space aboard the carrier, which of course makes everything more difficult and means personnel need unique skills.
* Found on another site.