Just as I thought. Winning competitions relies on a lot of luck in 3-4 games over the backend of the year at finals time, which makes the NRL narrative laughable. Furthermore, making the 8 is an easier task for the teams with the better and more consistent players, which only reside in about half of the teams in the competition.
Those figures right there just go to show that the salary cap (with TPAs) as it works today, doesn’t work.
I did some similar stats just for fun, but might as well share.
From the current teams this is how often they've made the finals in recent seasons:
Storm finals 8 of last 8 years (2 premierships*)
Broncos finals 7 of last 8 years
Cowboys finals 7 of last 8 years (1 premiership)
Roosters finals 6 of last 7 years (1 premiership*)
Sharks finals 6 of last 8 years (1 premiership)
Bulldogs finals 5 of last 7 years
Rabbitohs finals 5 of last 7 years (1 premiership)
Sea Eagles finals 5 of last 8 years (1 premiership)
Panthers finals 4 of last 8 years
Dragons finals 2 of last 7 years
Raiders finals 2 of last 8 years
Titans finals 1 of last 8 years
Knights finals 1 of last 7 years
Warriors finals 1 of last 7 years
Tigers finals 0 of last 7 years
Eels finals 1 of last 9 years
There's a pretty big gap between the top teams and the bottom teams. Most of the top teams have been consistently in the top 8 during the last 8 years, with most only having one off year (e.g. Roosters 2016 or Cowboys 2018). Titans, Knights, Warriors, Tigers and Eels have all been consistently rubbish with maybe a good year thrown in somewhere. Titans and Warriors one recent finals appearance each was also at 8th place.
Now compared to a decade ago:
Broncos finals 8 of last 8 years (1 premiership)
Storm finals 6 of last 8 years (1 premiership*)
Dragons finals 6 of last 8 years
Roosters finals 5 of last 8 years (1 premiership)
Raiders finals 5 of last 8 years
Warriors finals 5 of last 8 years
Eels finals 5 of last 8 years
Bulldogs finals 5 of last 8 years (1 premiership)
Sea Eagles finals 4 of last 6 years (1 premiership)
Sharks finals 4 of last 8 years
Knights finals 4 of last 8 years (1 premiership)
Cowboys finals 3 of last 8 years
Panthers finals 2 of last 8 years (1 premiership)
Rabbitohs finals 1 of last 6 years
Tigers finals 1 of last 8 years (1 premiership)
Titans finals 0 of last 1 year
A lot more teams were up and down. The only clubs rarely in the finals were Panthers, Rabbits and Tigers, and Panthers and Tigers won a premiership during that time, while Souths were rebuilding after being kicked out of the comp. Premierships were also spread evenly throughout the competition, instead of the last few years where they have gone to the clubs that are always in the finals like Storm, Roosters, Cowboys and Sharks.
Might be nothing but to me the competition definitely feels less even than it did a decade ago, especially with the amount of teams that continually struggle. With the recent big name retirements it might switch around in the next few years, but if it doesn't and the same teams still dominate then the salary cap is not working.