It is certainly a good money spinner given the time it takes to claw a 150 or a Warrior to 3500 ft or higher
Your dreaming Centaurus. Seriously, you think this time is wasted? The average student has around four hours before the first stalling lesson. On the way up you review the previous lessons. Glad you wern't my instructor, otherwise we would have popped out of the circuit area and straight into a stall.
Where were all you blokes when I was doing my training?
No doubt telling everyone how good they were back when they instructed.