We are talking about SL, not the NRL. I think we all agree that the NRL is a radically different competition. I don't think the debate is the same in the slightest.
Whether Penrith was the best team in the competition in 2025 is entirely subjective and your opinion. I'd disagree, I don't think they were a patch on the standards they had set, hence losing 10 games. They also lost 3 out of the last 4 so hardly hit the play offs in form.
Didn't Brisbane win it from 4th? Didn't Canberra finish top and lose against Brisbane the first week and then lost against Cronulla the week after to crash out of the play offs? That hardly suggests finishing top helped them too much and is counter to what you are trying to argue.