The ability to fly the machine and do the prescribed commercial/ATP maneuvers is what allows you to get your pilot's certificate. The ability to do some more complex job with the machine is into the gray area of operational training, and is much less legal, and much harder to regulate (if it needs regulation at all).
How do you teach torpedo dropping? Crop spraying? Test flying new blades? Landing on a white snow-covered glacier?
The list of things you do with helos will always be longer than the list of flight school lesson plans, because what we do is by definition different, and innovative.
Regulators who want to latch onto this new rich area of rules-waiting-to-be written just might just spend a bit more time making the right instrument approaches and routes for helicopters. I think this black hole of regulatory concern has been gaping for a few decades, and has been waiting for those helpful rule makers to jump in.