That's a shame although it's probably a good way to become an old, bold pilot.
I don't understand "[Chuck] is the only certified helicopter aerobatic pilot in the US". At least for fixed wing, there's no such thing as an aerobatic rating. It's a pretty good idea to get some dual and some training (to put it mildly) but there's no FAA requirement to do so nor to get any kind of endorsement.
So what does this mean? What's to stop anyone with a helicopter ticket getting some (lots) of dual from Chuck and becoming the next Red Bull display pilot (regulation wise, I mean)?