Demonstrably false. AOA is a function of airspeed, so off the end of the cat stroke it means something in a very real and immediate sense. In order to keep catapult end speeds within reasonable bounds, a lot of the older delta-winged aircraft used a longer nose landing gear to sit at a higher angle, inducing an AOA during the cat stroke to prevent settle. Extra room for large stores under the jet was an ancillary benefit.
Later designs like the F/A-18 and F-35 did away with some of this due to a number of features like leading edge extensions, leading edge flaps, and a high degree of control power stemming from their large horizontal stabilators. In the F/A-18, the highest AOA in the terminal environment is just off the cat as the aircraft accelerates under its own power and rotates based on stabilator trim setting (hands-free so the pilot doesn't over or under-rotate). With the gear and flaps down, the jet is seeking alpha (AOA), just like it does during an approach, so the loss of an AOA probe can cause pitch excursions immediately off the cat. Ask me how I know.
