When it comes to High School Sports, why is it that private schools tend to do better than public schools? they are able to lure better athletes?

[moviedude714]

I would say the biggest advantage is that public schools are limited to boundary lines, district boundary lines or residential boundaries.

Private schools or parochial schools have no boundary lines at all, which means they can draw or accept students from basically anywhere regardless of where they live, meanwhile public schools require that the students live within a certain distance of the school or get an interdistrict transfer which is normally a difficult process.

[jakeofalltrades]

the same reason private schools do better with grades and everything else. they can afford the best teachers, coaches, best equipment etc.

[GeanieJ78]

Students also don't have to live within a "district" to attend private schools. They can live wherever in the area and still enroll. So yes they have a "recruiting" advantage that public schools with geographical boundaries do not.

[Randomawkwardness]

Because they're a private school and that's it. They can afford to pick only the best and brightest and have money to train them as well as they can.