I think the NFL comparison is being taken too literally here.
For me, the comparison is made to highlight the point that a playoff system works better when every playoff game is a straight knockout.
The issue that the RL has, is that you either lose playoff games if you have only have the top 4, or you have very mediocre mid table teams making the playoffs if you have a top 8.
They won't want to lose playoff games because of the revenue and sky, but at the same time we need to look at the appeal of the sport outside of the current fan base.
If you want to bring fans into the sport we have to show them just how good the game is and how exciting it is, but how do you do that when a team who could have lost more games than it has won over the season makes the playoffs because they finished 8th.
It makes 90% of the season seem pointless!
The reason that it works in the NFL is because only the elite teams make the playoffs.
The reason why the champions league works in football is because only the elite teams make it through to the knock out stages.
A point was made earlier about how the NFL have got 32 decent teams which RL doesn't, but why do we insist on have a final 8 if we don't have the numbers to justify that?
A top 4 going straight to semi finals would not generate as much revenue and it would not make Sky very happy, but ultimately it will improve the playoff system as only the top elite teams would make it.
This would improve standing of the sport to outsiders and also mean that teams would have to push to catch up with the top 4, hopefully imrpoving the overall quality of the league.
If you are a mediocre team who finish mid table, but you know that will get you into the playoffs, where is your motivation to push to be a top 4 team?
More importantly though, if you improve the opinion of the sport to outsiders, the long term goal of bringing in new fans and hopefully eventually more decent teams etc across the country is more likely to be acheived.
Unfortunately like so many things these days, it is more important to the money makers, what is best for them in the immediate future!!!