Also in this case I suspect they needed to learn proper takeoff procedure. Since you can’t practice dying more than once the mitigation has to be avoidance (in addition to the stall practice you mentioned)
Technically, power-on stalls are supposed to teach how to recover from bad technique on takeoff/go-around and power-off stalls are supposed to teach how to recover from bad technique in the landing pattern.
In reality, they're both training-wheels versions of how to deal with any departure from controlled flight, which is why any professional pilot worth their salt should have a decent grounding in aerobatics and some spin/departure/out-of-control flight experience.
-Am (or at least was) a pilot . . . I could jump in and fly a bugsmasher today if I really needed to, just not legally without a doc visit and a checkride.
Also in this case I suspect they needed to learn proper takeoff procedure. Since you can’t practice dying more than once the mitigation has to be avoidance (in addition to the stall practice you mentioned)