BP77
You're still speaking crap. In fact, it sounds like it came straight off the back of an Oxford brochure.
Any Pilot wishing to work for Jetstar for instance, has to pass the same aptitude testing, whether cadet or EX GA.
As for the cadets? They need to draw a line in the sand somewhere in regards to entrance criteria to get the starting list a little smaller. Usually this will be in he way of high school results and subjects.
The way people talk about GA they make it sound like these Pilots step out of C210s from working in the Kimberley and front up to fly an A320.
This is not, nor has ever been the case.
GA Pilots start out in a single engine aeroplane. They accrue 1000 hours or so and an instrument rating before seeking multi engine work. After they have 500 multi engine command, they seek multi engine multi crew turbine experience. Once they have a year or two of this (generally in a 217 operation), they are up for a command. This will usually see them in the vicinity of 2500 hours, 1500 multi engine hours with 500 command and 1000 multi crew turbine.
They will usually have apps in with airlines at this stage and hold a full ATPL. While they are waiting for that call, they are accruing multi engine turbine command time and usually have over 3000 hours by the time they get a Airline offer.
Lets also be honest, while they are working in the regional airline, they are flying the same approaches, the same SIDS and STARS, under the same IFR regulations with similar calls, automation CRM and check and training.
It's all about small steps.
Transitioning to a jet airline from here is learning about flying a jet, and new company SOPs. They are not learning how to operate in a multi crew or how to operate as a Pilot.
Think about this before you shoot from the hip.