No. I've never been to the 7's because I have no interest in 7's, and no interest in spending all day drinking at an event I have no interest in. I'd rather go to the cricket.
How many exclusive 7's fans does rugby 7's have that do not follow 15's? I'd wager almost none. Therefore you are only reducing your market, not at all increasing it.
Okay so you've never been to an event and you don't like it. You have to realise you're negatively biased and not overly well informed about sevens. The fact you don't think sevens is an opportunity to broaden the fan base is why I asked if you'd attended an event, because you wouldn't think that if you had.
I'd wager that at the London 7's a few weeks ago (which I attended), up to 40-50% of the 75,000 that were there on the Saturday were not regular rugby fans. Quite possibly more. It was a very different crowd to what you see at a test match where probably 90% would be regular rugby fans. There was a much higher % of young adults and women there than you get at a regular rugby club or test match.
Sevens might not have many week in week out fans that don't watch 15's, but what it's developing in certain places around the world is a reputation for a great day out with some exciting on field action and a festival atmosphere in the stands. It just hasn't happened in Australia yet. But if it can happen in London within a few years (as I said, it was ghost town at the London 7's only a handful of years ago), it can happen in Australia with the right location and promotion. This year's theme in London for example was Monsters, and so half the crowd were dressed up as anything from dinosaurs to zombies . Between matches there was music everyone danced to and stuff like Kiss Cam, which was funny because they'd occasionally stop on a couple of mates dressed up as aliens or something. On top of that the rugby was fast paced and you get lots of different matches, some you watch with more interest than others. In a multicultural city like London you also get pockets of support for pretty much every team so that adds to the atmosphere as well.
I agree the NRC is crucial, but it doesn't mean the ARU shouldn't do anything else! The NRC is not going to immediately attract huge crowds or large numbers of television viewers, and in some ways it's more difficult because it's 3rd tier and it will need to develop support for new teams. A summer sevens series would also start small and build over time, but it would be the top tier under internationals and it would involve teams people already know and support. I'd play it at small grounds (eg, the likes of North Sydney Oval for 3 hours or so on a Friday evening), keep prices low and position it as a fun evening out with family or friends. It would be run over about 3 or 4 weeks tops and only a couple of nights in each place per year. Target uni students and the after work crowd on a Thursday or Friday evening, families and younger people in general on the weekend.