I share your sadness - unfortunately the horse bolted 10-15 years ago and NSWRU/ARU have only just realised that there's an issue in the state school system.
I regret to say that with the exception of the Sports High Schools, Agricultural High Schools and a few Boys High Schools such as Epping, Randwick and Homebush, that state high schools will simply, too often lack the Sports Ethos needed to run an effective Rugby Program.
Teachers don't get paid extra for an after school commitment, In fact some schools and Teachers discourage other members of Staff from doing it. One for Industrial Award reasons as its not in their contracts, although School Principals can direct Staff members to engage in after school activities. But few would do so for fear of their teachers rebelling against it. Second, it makes those Teachers who don't involve themselves in after school activities look bad.
The solution I believe is to invest heavily in club juniors and get the clubs and Sydney Rugby Union to control their own juniors. Such as appointing their own coaches and development officers. For instance Eastwood or Gordon juniors from 12 to 18 years, would wear the club colours and uniforms of the Colts and Grade teams. Thereby, identifying with their parent club.
So Eastwood or Gordon would merge all their juniors into the following age divisions:-12s,13s,14s,15s, 16s and an open division for 17and 18 year olds
This structure would thus reflect the GPS,CAS and ISA school systems or age groups. A GPS/ CAS/ISA schools might even play a fixtures against these club juniors. They do in Canberra.
Rugby League survives on club juniors more than schools. Its time Union stop relying too heavily on our elite schools to be the essential feeder for our game. Although, I am sure their are numerous difficulties with such a system I believe an alternative is required to boost numbers playing rugby. Our game is approaching a critical stage and its time the ARU, stop "playing the fiddle while Rome burns".
Failure to do so and in 10-15 years, this site might well be devoted to soccer. Or even whose, Rugby League, because the ARU "Dropped the Ball" and failed to read the signs regarding the decline of junior player numbers.
Gentleman, something needs to be done, our game is in jeopardy at the junior level. So I wonder, if the "Shore Mafia" who currently run Australian Rugby Union, are up to task. I hope they are, but at present I don't feel that confident in their leadership and direction.