In my opinion , the magics words are "selection" and "training".
As the time (or the money) to train a pilot in an airliner is the same , is better to choose the right material to have the better product.
Today selection as changed in money , so company doesn't want to pay for instructors , screening and training.
Is possible to join a RHS almost without a real selection.
I think that , if there is the possibility that you 'll be discharged along the way
( like in military training ) you are moore keen to listen and study.