Aeryon wanted to leave a legacy and a strong foundation.
Aeryon have the system but life and death is unpredictable.
It is not like the system made him invincible. One day, if he is unlucky, he could die of a stray arrow. Or of sickness.
So, he already planned a few foundation. Some of it are just seeds he planted hoping that someday, this seed could bloom beautifully.
Right now, the caste system is still there.
And Aeryon is not eager to quickly abolish it.
Not only because it is beneficial for him but also because doing it right now without the proper resources would make him capsize first before he could even have any chance of doing anything
But if he managed to unify the Steppe and conquer the Central Plains, at that time even if he could not abolish racial caste system, he would dilute it.
Discrimination is just one of the reason why Yuan dynasty was not looked favourably upon by the Song people.
