@Tinstaafl
Think about the following situations:-
(a) On a calm day and the ship steaming at 20 knots, the relative wind is across the line of the flight deck and any aircraft FU's will end up in the superstructure.
(b) On a day with a 25 knot wind, the ship when steaming sets a heading to provide a relative wind down the line of the flight deck. Any FU's and the ship is still effectively heading across the intended line of flight.
The angle deck carriers are designed to minimize the above situations, and furthermore the superstructure is on the starboard-side because that is the 'give-way' side and the Fish Heads prefer to see everything on that side.
mm43