I'm going to call SHENANIGANS!
HT students "solo" with another stud on a helicopter that is much harder to fly than any fleet bird (none of the whiz-bang electronics that make fleet birds easier to control) after just a few hours of instruction. Why do we have greater trust and confidence in non-designated pilots who aren't even NATOPS qualified to fly the TH-57?
Fleet H2Ps are designated Aviators, and designated co-pilots, who are NATOPS qualified in model. They have already had a check ride, conducted by a model manager-designated NI or his trained ANI, by which they have demonstrated the knowledge and skills required to safely fly the helicopter. (In fact, how many of them have been reminded that they need to be ready to take command of the aircraft if their HAC takes one through the running lights?) There is absolutely nothing that should prevent two designated H2Ps from safely executing the missions they have been trained and qualified to complete.
That said, if we don't trust them or trust in their abilities to safely fly the missions we have trained them to conduct, perhaps we need to look at OUR practices and procedures for training our pilots? Sounds like a training and leadership failure on our part. (As you can tell, I am NOT a fan of "HAC-Buts."
No, the reason H2Ps don't fly with each other is simple: Nobody wants to have to answer questions or put their own careers on the line.
As a "senior 2P", on the cusp of HAC, I can say in hindsight, that as a 350TT new 2P, I was little more than a competent sand-bag. I was fully capable of flying the helicopter, knew the basics of the systems and EPs, knew procedurally how to fly VFR/IFR etc, but honestly, if ANYthing happened I don't know (in hindsight) if I'd have made the right decisions. Ultimately that's all HAC is. Stick skills come with time, and you'll never have the experience going on a det you've never been on before, but being a HAC, you've "practiced" having experience through training/scenarios and boards to make good decisions. Sort of a "fake it til you make it" premise. The difference between being a new 2P at 350-400 hours and 500 hours has been a HUGE metamorphosis.
That being said, do I think even new 2Ps can take a bird around the HG pattern and be fine? Yeah, absolutely. But at sea, I'd be a little more wary to send out two 2Ps. As stated above, if they were two 2Ps going into their HAC boards, sure. But two new 2Ps, out to sea? I don't think I'd be comfortable doing that, as a hypothetical authority figure.
ABSOLUTELY agree with the reasoning you bolded. That's probably the bottom line. 999/1000 times it would be a non-issue. But that ONE time, someone would do something stupid, and end up spinny side down/off the runway/pad and there would be hell to pay.