"Too many Helicopter Operators want to use their own Check Airmen and thus avoid Third Party evaluation of their crews. "
I have seen both sides of that coin with 2 large operators:
One had a free-standing training department that acted as an internal standardization and safety department as well as documenting the required training. The department was a resource that addressed immediate issues referred to them as a final arbiter. They also contracted some training, but one always knew that any issue could be addressed through the training department as a professional.
The other viewed training as a management, standardization requirement. A flying issue was a management issue addressed through the management ladder. Very vertical, and not really an asset for line plots. The commitment to safety was/is not an issue, but difficult to address issues as anything other than oppositional and antagonistic as everything goes up and down a management ladder.
On the other hand, contract training benefits by specialization in what's being instructed, and suffers from not being really able to align and identify that with exactly what's being done on the line.