"It has been well known throughout the industry for at least the last...." 13 years until their demise, AN, EW, TAA etc. took ANYONE who could walk.
Those airlines no longer exist - QANTAS does (for the time being).
Ansett dedicated a training captain to their trainees whereas QF move you from pillar to post and back again. It's a wonder anyone gets through really.
Of the 5 airlines I have worked for, Ansett was the ONLY one that used this system,
bonvol.
Now I must admit that
I was always fortunate to be allocated a T.C. who knew how to impart his knowledge, and wiith whom I enjoyed flying, being quizzed and tutored post flight, and then the socialising.
The Ansett I flew with had a terriffic selection process for their T.C.s, and the odd one who slipped through was usually culled out after it became evident he wasn't suited to the position.
Otoh, the system of flying with a different T.C. also seems to have its advantage, however I don't believe there is the advantage of "continuity" that trainees received under Ansett's system. But they work anyway.