That's my whole point...I would dare say there is *nothing* (in common flight training scenarios using common trainers) that a student could do that would result in a "smoking hole" result.
And for the sake of discussion, I equate "smoking hole" with either, "fatal" or "total hull value loss of the aircraft."
I've never had a person do anything that I couldn't recover from in a matter of seconds. In the practice area, maybe a spin is the worst that could happen, but even then, the planes we fly pop out of spins no problem.
In the pattern, maybe bouncing or porpoising a landing, or botching a go-around? Again, easy to recover from and nowhere even close to fatal. Worst case would be the nosewheel breaks off and you have to fill out some paperwork.
There are plenty of things in flying that can kill you, but students aren't the big ones. They might make me fill out a NASA ASRS report or insurance claim form, but I've never literally feared for my life when I've been training someone.
I'm just trying to get instructors to keep things in perspective. This topic holds a lot more importance than many instructors realize. If a student/customer walks in to a lobby full of instructors and hears them BSing about how they almost died today on a training flight because of their stupid student, how is that going to make the new guy feel? How is that going to reflect on flying as a whole? It unnecessarily gives the impression that flying is dangerous, risky, and difficult to learn. It makes the new guy a lot more scared of learning to fly and makes a new instructor a lot more worried than he should be. Flying might have elements that are dangerous and difficult, but they aren't found very readily in the flight training world.