Pilot development failure
Training is the foundation but experience is the walls and roof.
The FO and SO on AF447 were sponsored fast track JAR "integrated" students
Who had minimal time on hand flown machines then straight intoFBW automated Airbus 320s before burning thousands of hours on autopilot in the a330/340.
Even the big JAR/EASA "integrated" and MPL schools admit 80% of these students are scared of flying in light aircraft, scared of stalling and more interested in a lifestyle than aeronautics.
At the time of AF447 disaster I met one cadet on a six month flexi crew co tract with a uk airline. They did not understand why they shouldn't climb too early at high weights nor what Mach buffet was.
Add in the stupid stall recovery taught for min height loss instead of angle of attack reduction BEFORE adding power on FAR25/EASA25 machines and very poor simulator stall replication plus Airbus myth about TOGA and angle of attack protection and you have such a sad waste of life.