FBN, you're a little misinformed.
The cadets start out pretty cocky, but they find their place within a couple of years. There is a HUGE difference flying with a cadet vs flying with a pilot that has some sort of flying background. It's generally the big picture stuff, situational awareness etc.
There is a place for cadets. I just don't think it's in the right seat of a jet. They should be cruise FOs for a couple of years, or at least do a regional placement like the QF ones used to. Plenty of regionals would love to have them. Particularly the one that don't pay very well.....