If you are talking about Canberra REGION rugby league you may be right, if you are talking about just Canberra, then i reckon you may be wrong.
For example in the under 13's CDRL ( canberra district RL) this year 16 teams participated - 7 teams were from outside Canberra.
By comparison 12 teams contested AFL Canberra's under 13's, only one team was from outside Canberra.
At adult grass roots level the disparity is even bigger.
27 mens senior RL teams across Canberra district RL ( first, reserves and George tooke ) 14 senior mens teams are from outside Canberra. ( more than 50%)
33 mens senior AF teams across 4 divisions in AFL Canberra, 8 teams from outside Canberra, ( 2 from Batemans bay, Cootamundra, Yass, Goulburn, Cooma, 2 from QBYan) ( less than 25%)
Whatsmore i dont believe that club auskick numbers have been included because looking at foxsportspulse and the 2016 fixtures, it does not look like the CDRL have 2,000 more juniors than AFL Canberra, they appear to have more teams at junior levels, but in general RL teams are smaller.
Well played GM
I was arriving at a similar conclusion doing pretty mush the same assessment of team numbers - without offsetting the Goulburn players. Of course there are 18 players in an Australian football team compared to 13 in league so the evidence points significantly to the afl having considerably more juniors and a lot more seniors!
Big league in future take care not to rely on a hack journalist for your "facts".
Soccer and union numbers also look dubious. There are 40 odd male under 13 soccer teams, which suggests male numbers are about double. There are 30 odd adult union teams