Agree with this. But I don't know what the U18 / U20 reps sitchy is in Sydney / NSW, as Laurie Daley Cup is just for regional NSW teams (and Andrew Johns Cup the same for 16s. I don't believe these two comps are part of the pathways - e.g., in between Matts and Ball - and think they're used to help select Country based players for NRL clubs' Matts / SG Ball squads the following year. The Bulldogs team might be connected / affiliated with Dogs, but it is actually a "North Coast" side.It’s true that a power game alone won’t win you a ball or flegg title. Not having a team in the Laurie Daley Cup (u18s) makes the transition harder.
It is just a guess, but I would imagine those Harold Matts kids that don't make the SG Ball squads would just play club footy in NSW (some, if they can handle it, playing Open Grade) and perhaps train as part of a U18 / U20 development squad as well if their club has them?