You seem to be saying that the quality of helicopter instructor is poor because they are private pilots, self-funded and wannabe CPL's. Yet still with no metric for the measurement of this quality beyond the anecdotal.
Pitts, you can't ignore the anecdotal or the blindingly obvious - if you wanted to learn a complex and challenging new skill, would you choose the guy who has only just learned to do it himself or the guy who has plenty of experience?
I know it is unfair to generalise as some pilots do have natural abaility, both at flying and instructing but they are very few and far between.
If they are honest, how many of those who earned their hours as a low time FI really thought they knew what they were doing or considered that is was the blind led by the partially sighted?