I'd also add that across much of that time, the Roosters wouldn't necessarily have been heavyweights.
Much like I don't subscribe to the "Roosters are obviously massive cheats look at their roster!" derping, I don't believe they are anywhere near as kissed on the dick by the refs as some of the short poppies on here. In fact I think they've done remarkably well to overcome some very poor discipline at times. But I do think that the successful teams get far more favourable calls than unfavourable. So for me it's not "oh the Roosters get all the calls", it's more that the successful teams get all the calls and that happens to be the Roosters in recent times.
The other thing I would say is that the Roosters are one of the teams who are very good at giving away deliberate penalties. It's all well and good to talk about penalties given/received, but it's meaningless to a large extent without context. What the Roosters, and other clubs like the Storm and the Sharks, are very good at is managing penalties. And I'm not talking conspiracy theory shit, I'm talking gaming the system and I wish Parra were as good at it in many ways.
For example...If they're on top and give away a cheap penalty, on the first tackle midfield somewhere, it doesn't necessarily affect them all that much. It might even give them a better defensive line. But if you do that a few times, the refs (who are all about balance it seems) worry less about looking hard for penalties, or they're just that little slower with the whistle at big moments because they're gutless. Especially when reffing the top teams. Bellamy and Robinson and Flanagan and Bennett all know (or knew, in Peptide Shane's case) that and they use it to their advantage. Brad Arthur did it well in 2017 too, before the rule changes hammered his tactics in 2018.
Ultimately I think the root of any of these discussions about penalties or favouritism or whatever boils down to the referees needing to be better. Are they swayed by the likes of Cam Smith? Absolutely. Do they have preconceived ideas? Absolutely. Do you they want penalty counts to generally be nice and even? It certainly seems like it. Do they referee the game differently in the first minutes as opposed to the 79th? Definitely. There are heaps of complaints but all they boil down to IMO is needing more accountability and better referees.