Wow. Think you're going a bit over the top here.
The bulk of the club base in the NRL has stuck with their same colours over time and most clubs have retained their logos at least since 1998, some longer. I think you lose sight of that in getting angry about one-off theme jerseys.
Dont get me wrong, this is probably the least shitty example (but that just shows to me how low the standards currently are)...
You say "the bulk of the club base in the NRL has stuck with their same colours over time" but youre entirely missing my point. The Broncos (like every other team) have changed their design a dozen times in the last decade, so in terms of design there is no such thing as a "Broncos jersey", the only thing left to them is their colours.
For them then to take one of these designs and change the colours, means there is nothing left of their brand.
This absolute disrespect for fans has gone on for so long that we all just accept it, but fan loyalty does have its limits. After 20 years of chopping and changing jerseys, we really are getting to the point where there is nothing left for fans to cling to.
When they continually change their jersey AND they continually change their colours, what is left to differentiate them from every other team? The clubs are sleep-walking back into the worst parts of the Super League war, and no one cares enough to stop it ("theres money to be man, boys!!")...