It's not about whether a trained cadet or a former non airline experienced pilot is a better fit.
What the FAA did with the mandating of a Min ATPL for all RPT flight decks, was to put the "Value" back into the profession.
The proliferation of Cadet Schemes in the US was a direct response from the airlines in their constant war in lowering the wages and conditions of professional aircrew. To this end they needed a way to maintain the over supply of commercial pilots. And it worked! Pilots unable to live in their home base. Pilots having to commute vast distances. Pilots on less than minimum wage. Pilots on food stamps! And these clowns (operators) could see no problem with that!
The entire notion of competing for labour is so alien to airline management, so addicted to the ease of exploitation, that what we now see, is the wholesale grounding of much of the American Regional fleet. The penny will drop however, and the operators who accept the reality, placed upon them by a truly enlightened regulator, will be the ones who will ultimately survive.
As for the rest, trust me the travelling public will be much safer without them as a result.
As for Australia? We have the antithesis of an enlightened regulator, and a breathtaking ignorance of the situation, from both sides of politics.
God help us!