Doesn't the balance of the argument centre on whether the MPL can provide suitable directed training to candidates that has, in the past, been gained in terms of experience by pilots operating in GA and the military. It may not have been jet specific but it is the esoteric aspects of our craft learnt in those spheres; weather, decision making, SA etc that we are now hoping to teach candidates in x hours in a sim. It may have taken x hours of airline operation or x arrivals and departures for a pilot to have encountered a similar problem and taken appropriate action such that an incident/accident is avoided. It is unarguable that the crew of QF32 gained incredible insight (experience) from their incident yet every aspect of this non-normal cannot be taught in a sim because you literally had to be there. Most of us haven't had such an extreme situation but have had situations thousands of times in thousands of hours.
It's ironic that my son is learning to drive a car in a competency and experienced based system. He must complete 120 hours of experience before he can sit his, competency based, test. Then for a year he can only drive with one passenger to mitigate risk to others while he gains experience. Perhaps we should get the RTA to submit at the enquiry.