tbh I really have no idea how it happened like that... and oh do I wish it was the other way around...
My weak theories are...
- Professionalism. This is probably the biggest reason why union lags behind league. Rugby league was a professional sport in Australia well before union. Hence, anyone who excelled at union would switch to league at a senior level so they could make a living playing.
Although now that union is also professional and the global union economy is waaaaaay bigger than the global league economy, it is starting to go the other way and you are starting to see excellent league players switch to union for teh monbies (even though they say it is the challenge, blah blah lol).
- Numbers. Rugby league has always been more associated with the "working class man" game and rugby union as a more elitest game. Hence, league gets promoted more heavily in public schools and union more heavily in private schools. There are more public schools than private schools.
This kind of became a self perpetuating thing and is related to the first point. In the past, if you played union at a high level, you still needed a job to make a living. Also, because many of the union players came out of private schools, you would find lots of players that were also lawyers, doctors and other high-tier professionals.
So the "working class' league fans would be like "pffft, union is a phags game. they're all lawyers and sh*t. not like my mate robbo who plays league and used to be a brickie". Aussies love the notion of the "
aussie battler" It goes all the way back to
Ned Kelly (even though he was Irish lol) and our convict past.
Although, in actual fact this stereotype kinda died out with the last generation of players because the current generation is the first to really know full professional union. So while many of them still come out of private schools, the have gone through school knowing that they can make a living out of rugby and hence don't pursue another job.