When I first started instructing I'd allow the student the chance to get "hopelessly low and slow on the approach" before intervening with my "superior skill....."
......you can see where this is going can't you.....
Now, after a few years instructing, I will allow the student less chance to get "hopelessly low and slow on the approach" by using my "superior judgement...." and what is more - have developed the ability to impart that "superior judgement" onto the student as is my role.
Too many "hopelessly low and slow on approach" moments make you develop better instructional methods in my experience.
VFE.