After much argument I finally got an agreement that the competition was not for development of core skills.
Your belief that it does not serve develop core skills != the NRC doesn't have benefits.
If nothing else it serves as a prolonged trial for the next wave of Super rugby contracts.
Naisarani had a great game on the weekend for the Force. Would he have a contract there if it wasn't for the NRC? Likely not.
It could also be argued that it assisted with Bill Meakes' transition to Super Rugby and the Western Force squad and the transition of Jono Lance to the flyhalf position.
It's an awesome platform to expose new players and, yes, to develop them. The players have emphasised this several times. It puts fringe Super players against rookies, allowing the rookies to test themselves against those with Super Rugby experience and allowing those with Super Rugby experience to gain some confidence and match fitness in the off season.
This is particularly important for Brumbies / Force / Rebels squad players who don't have the quality of competition in their local competitions to really test and hone their skills.
Just look at Matt Phillip, Irae Simone, Jake Gordon, Alex Newsome, Samu Kerevi, Izaiah Perese, Thor, Lukhan Tui, James Tuttle, Tom Staniforth and probably many, many more.
Even after that, its a solid platform to send injured Wallabies or out-of-shape Wallabies to in order to get them right for higher honours. E.g. Simmons, Quade, Carter, Speight etc.
Despite your beliefs
it actually is a good development platform.
Aside from that, I'm 22 and from the Rugby heartland of Sydney. I've seen more NRC games, live and on TV, than I have Shute Shield games since leaving high school.
Why?
The NRC is fast, exciting and has players I recognise against players who I've heard have excelled at lower levels (e.g. Shute Shield). For me and most of the people I know, its a far more interesting competition and has that entertainment factor on its side as well.