It's a listing of the best high school players, not based on potential at the next level. A lot of these player's stats & impact will have peaked at the high school level, while other continue to move up the ladder into the next level. The 5'5" guy probably dominated in most high school games, but would at best be a decent spark plug in D1. Seems he knows that, but at least he had high school.
A guy like Cliff might not reach the peak of his powers until his 3rd year in college, if even then, while some of the other SL First Team might not even make a dent in college. It is what it is, a recognition of a good high school season.