Of course being an Instructor they have all the answers? The moment someone has a FI rating it gives them all the answers? I don't think so, it only comes with experiance and there are many PPLS out there with way more hours and experiance than some of the Instructors I have come accross.
The point I am making is that in the case that TNR Fairy quoates we don't know what went wrong but from the description of the incident I doubt even "super instructor" could have solved the problem in the time it took the aircraft to break up.
I think that particular case was a very bad example and was more an attempt at panic mongering.
I would also agree that I would not want to give the controls of any R22 or R44 that I was flying to a passenger as they are so unstable, but a fixed wing aircraft is stable by its nature.