Aside from the fact that it only works on her own students you mean?
the same could be said for many of the other clips shown
the OP has shared his experiences that now make much of what he sees possible and understandable
maybe a year or so back he too, might be making the same comments being made by others.
most here have not indicated weather they can do any of what is shown.
I think if one could do even a little of what is shown then as the OP, they would tend to see the skill and usefulness
of the skill. what is evident is that no matter how, what or why, its explained or shared.
the standered answer is that its somehow fake or not real.
dont agree with the "OP" on the last clip posted.
the method the teacher uses is very different.