Given that, I wonder if many of the ills, railed against by people like myself, with how high school sports have changed over the past decade or so actually stem from the removal of the larger private schools from a mixed league and with the creation of the Trinity League. Up until the recent changes to the playoff format/division placement, the Trinity got 3 teams into the playoffs and likely a 4th. This put tremendous pressure on coaches in the Trinity to win or risk getting fired at a school where the desire to succeed in sports was seen as a way to attract kids and fill seats (which isn't to say that public school coaches don't get fired for not winning....). So you recruit. Run youth camps. Build bigger and more expensive facilities. Partner with groups to get kids on your campus who can play and help you win. Hire coaches whose sole job is to go out to watch youth teams play. Pay coaches big money to make sure you win, and fire them when you don't.
Had these schools remained in mixed leagues would that pressure to win at all costs have existed? It certainly seems to have created an arms race between schools in that league which has also had an outward push to other schools trying to keep up.
There are other schools private/public that want to play the game (Oaks Christian, Calabasas, Westlake, Mission Viejo, etc). Not too many willing to run bus fleets to compete though.
I think some of the publics certainly would do what is being done at the privates if they could figure out how and come up with the money for it. Some of them have been bringing kids in from all over, just usually in different ways than running shuttles.
Same in other sports- TL girls soccer possibly tops in SS, same for volleyball, same for swimming/water polo. JSerra aggressive in hiring top-class coaches for both lacrosse (away from SM!) and water polo.
When MD was in the South Coast league, SM in the Sea View and Servite in the Golden Goose Leagues they only needed to be talented enough to compete and win against those teams.
When the 4-team Serra/ 4-team Del Rey arrangement was formed in 1999 there still really wasn't THAT must difference in talent between those three teams. In fact the most athletically talented team (SJB) was for years the worst of the four Serra members largely due to inept coaching.
The creation of the 6-team Serra league from 2001-05 was probably the most balanced and competitive that league has ever been.
Financial aid at the time might have been a few thousand dollars max to a few kids. Today? Holy cow. It's a full ride for "A" classes players.
The realignment of the Serra League into the Trinity League for the 2006 season brought in two outsiders and this forever changed the way those teams approached talent accumulation and facilities. JSerra started from scratch and tried all sorts of creative ways to attract talent. OLu had the benefit of a peculiar academic program that was so un-rigorous that it made everyone wonder how they could possibly be credentialed. Those two were more disruptive than anyone realizes.
Then the impossible happened. First OLu, then Servite, then SM, then Bosco won state titles. By 2014-16 JSerra looked to be on the cusp. Fan's expectations went through the roof. Mater Dei could not stomach this they made adjustments.
Now here we are.