This industry must be one of the very few where the individual does not have to be selected to commence training with an approved organisation.
To train for medicine, law etc the competition is very tough, and only a fairly low percentage are successful.
Aviation on the other hand [excluding the military] seems to be as much a function of ones cheque book as anything else.
So it is hardly surprising that not everybody who is issued with a blue book ends up in the right hand seat.