Absolutely, no arguments there. The AFL would love to have sides in mentioned areas such as NZ, trial games have been played there before with some level of success.
The point of my post though, was to talk about crowds, and not expansion. For RL to remain a sport in the next 20 years, it has too be pulling higher crowds then 16k average. Fair enough, it my never reach the AFL's standards, but in this case, if you use AFL as the benchmark, it is something to aim for. If we can get 30k averages in 20 years time, the game will be in a good place, with high amounts of season ticketholders and gate reciepts bringing in handy streams of revenue week after week. Hopefully the clubs in non-RL heartland can get some decent crowds as well, eg: Swans and Lions getting big crowds in non-AFL heartland (btw, not asking for direct Broncos comparisons here;-)).
Anyway, it's just something to aim for. 99% of people may hate AFL on here, but it doesn't mean we can't learn some lessons from their model.