There are 1000 pilots at JQ and I can assure you that most have no desire to go to QF and be 15 year SOs.
Perhaps the accelerated path given JQ pilots was at the expense of the mainline pilots. As you quite rightly assert, there are entities flying Qantas colours too, beyond those routes gifted to JQ.
Nothing to stop QF management pursuing such a policy with contractors flying JQ aircraft, all in search of lower unit cost.
Of course though, that distracts from the present reality that the Qantas group finds itself.
An incessant internal focus, at war with various groups of staff yet the market continues to move beyond them.
Their fleet metrics are horrible.
Their Capital Expenditure requirements, will, in all likelihood, exceed at least six times what they spent buying their own shares back. Additionally, they still have to pay for the $9.5 billion JQ order. Instead, they focus internally, setting work forces all against each other, hoping to save a penny. Picking up a penny in front of a steam roller is not good long term strategy.