1. After a decade of the club soccer slog, away from home, with an audience of self-interested parents -- they've earned their glory days. Give them an audience of their peers, school pride, passion, rivalries, drama.
2. They're also earned a potential return on financial investment. Elite club soccer (like club basketball) should be a pipeline to high school recruiting/financial aid/scholarships/etc. A worthy end of the rainbow on its own. The "pathway to D1/pro" is narrow and improbable. The "pathway to a great high school" is realistic and achievable and can be life-changing outside of sports. If the high school game were relevant, the race to create the best teams would follow. Some of the top high school basketball programs in LA are highly selective private schools.
3. Confidence, baby. A role player on an outstanding MLS Next Team -- fighting for their spot, afraid to make mistakes, unrecruited by the academy -- might forget how great they are at this game. But they could potentially be a standout star on a high school team. For the 99% who aren't going pro, these should the confidence building years. Give them an audience, let them shine.
4. Give a purpose to the massive youth soccer landscape in this country. Millions of kids play soccer, but the MLS Next isn't building off of it. Banning high school soccer sucks the best players out of the soccer ecosystem and even walls them off from their own social lives. If instead they injected the best youth soccer players (their names, excellence, dreams, rivals) into the culture, they would grow the game/their audience.
5. Is "make soccer relevant again" really an unpopular opinion? It should be the most popular opinion.