To me the best way to look at it is as follows

I am fairly certain that all schools in SC have courses divided into levels for example honor classes, AP courses, college credit or whatever you call it, and regular classes.

if Billy qualifies for the higher level class is it not in Billy's interest to attend said class?

So the school system recognizes that there are students and then there are students.

You do not place Billy in the same class as Bobby simply because the speed of learning is not conducive to Billy's or Bobby's development (depending on how you look at it- too fast or too slow).

So why would sport be any different? For starters Billy and Bobbby are in the same team but not of equal skill. Would the coaching be geared to the better player or the worse player? So practicing 5 days a week trying to get everyone else up to a level some have already achieved may not be best for their development but better the lower players.

In the end it depends on what you are trying to achieve...HS sports have many pros that clubs do not have and vice versa. It is all in the eye of the beholder.

So give it a rest...as someone has already stated it is a dead horse.