Pilots fly jets all the time straight from GA with minimal experience.
Yes but, it's a lot easier and cheaper for them to recruit people with appropriate experience, who require minimal training and are almost certain to get checked to line.
It's simply a question of supply and demand. If they have difficulty finding applicants with the specified experience they will need to relax the requirements and increase the training capacity/budget.
QANTAS may not care so much about what's in the log book because they are geared up for training and want to employ "their type" of pilot.