Hi Greame,
Most newish instructors get a buzz when their student progresses and achieves milestones quickly. They vicariously thrive on the student's lesson. They tend not to spend time on relaunch and self rescue because it isn't an adrenaline exercise. Often it is slow, a little dangerous, and the lines get in a mess. It also puts the student in a position of duress that they have to deal with. Just like in the real thing

The instructor simply has the wrong perspective. The buzz should come from seeing the confidence a student develops rapidly after their first, "full on, real conditions", self rescue. The confidence allows the student to relax in the ensuing part of the learning and they then learn faster without the mental block of the potential trauma and the fear of the unknown which keeps them in fear of progressing too far.
I get a better buzz from a student who, without outside assistance, gets themselves and all of their gear back to the beach in quick time and in one piece in their first lesson.

Instructors who crow on about how fast they get riders up and riding are amateurs and need more experience teaching. Some will learn in time by asking themselves, "What went well in that lesson that I can re-create for others?" and "What didn't go so well, and why?", and more importantly, "How can I improve that lesson for the next student?"
Some many instructors just reckon they rock and need little improving.
To all the instructors out there teaching. Accept the stone cold fact that you don't know everything ..... and never will, and that there is always room for improvement, and then you will likely, always improve

DM