Cor Whirly. That is one big question.
Personally I don’t see it as just a QFI/QHI issue. I see it as a general teaching issue. I feel it does not really matter what you are teaching. If there is a formal syllabus and some sort of standardised exam or test at the end, then there are two main issues, which must never be confused:
Number 1 is about the information that the teacher uses. Is it correct? Well explained? Does it fit the syllabus? Does the teacher have at least a little depth beyond the syllabus being taught? Is the subject matter really understood by the teacher? IE this is all about the quality of the teacher’s knowledge of the subject.
Number 2 is about whether the teacher is a good teacher. This has nothing to do with the facts of the subject being taught.
Teaching on a one to one basis (the way flying instruction tends to be carried out) I would say that a teacher would not be a good teacher unless they instinctively adjust their technique to suit the individual student. IE this is all about the way the teacher treats the student and how the teacher adapts to the student. It has to be that way round.
In my book a bad teacher only knows one way of treating a student while a good teacher is very flexible.
Where flying is concerned the general teaching plot is thickened by the critical nature of such things as dual safety, solo safety and ensuring that the student has the correct level of confidence. With flying (or any other sort of hand eye coordination skill like water skiing or gymnastics or taking a penalty kick etc etc) the student HAS to believe they can do it. The teacher has a huge task (sometimes) to make sure such belief exists. Not too much, not too little, but just the right amount.
Only gifted teachers can handle this sort of thing subconsciously. The rest of us have to work at it. I certainly had to work at it when I was checking out Harrier pilots in the 60’s with no two seater and no simulator. That was not a situation where one brief fits all to put it mildly.
So far as you are concerned, if you feel you have enough of Number 1 to teach choppers I am absolutely sure you will have all the Number 2 it takes just because of your own experiences. The fact that you have even asked the question here when you jolly well know the answer is another big pointer, plus you are a lady so you are naturally into people and not just things. Unlike blokes like me.