And that's a perfectly legitimate and understandable position. Another variation is this: High school is to PLAY, with training environment as a bonus. Academy is to TRAIN, with playing time (presumably) as a well-earned bonus.
Top players recognize the benefits of both.
I would add that, for top players, high school gradually loses its benefit as kids age up. A talented 15-year-old H.S. freshman can really benefit from "playing up" with 18-year-old seniors. As he ages up, though, the physical challenge diminishes, and the mental challenge of leadership and self-motivation really begins.