This may not go down too well & I expect the post to be removed:
Back in the day I was once told:
You can teach a monkey to fly:
BUT a very big BUT
Only 5% of the population could actually be trained to be a Pilot. (This means that only a small number of people have the ability to assimilate information whilst under stress & such things as coping with responsibility etc etc)
Again a BUT
Only 2 to 3% will actually make it & become a PILOT. (Sorry for shouting)
Maybe aviation is now starting to see the results of every tom dick & harry getting their flying licences. (Monkeys)
Trouble is that with the lack of available training aids (Sims for upper Air Work) the Monkeys can not be trained, so you have to rely on pilots which now appear to be very few & far between. (Would the likes of Chuck Yager "lost" the aeroplane )
IMHO Airbus particularly tried to design an aeroplane for the monkeys but have obviously failed in that respect.