I don't get it either. How I was trained during ME/IR was to recover without altitude loss when doing stalls in landing or take-off config. Clean stalls were normally trained based on 'minimum height loss'
it is wrong, I completely agree with you.
When I moved on from the MEP to MCC on the 737 I saw way to many fellow students entering secondary stalls when recovering. When you have height to spare, use it! On the 737 you will get a huge pitch/power couple especially at lower speeds. For stall recovery you actually have to keep forward pressure on the yoke to let the nose come up really slowly.