Because this world is not fair, and that's quite normal; for if true fairness were achieved, the world would fall into chaos.
In such a situation, the academies established by the Sun Dynasty provide a chance for those who have been eliminated, a chance that is not absolutely fair, but at least relatively fair.
"You may be turned away, but that's only because your skills are inferior, not because of your humble origins or lack of funds."
This is what Edmund Donks, honorary dean of "Edmund Skyfire Academy," a Legendary Rank Dual-system Wise Man in lightning and fire, said to a down-and-out dwarf who had traveled from afar to Academy City, yet hesitated before the grand gates of Skyfire Academy. It's not a promotional slogan, but it has been revered by countless future students as a classic.
