The sage was already very old, and his childhood memories were vague. The other sage didn't know how to raise a child. The surrounding villages shunned people like them like snakes and scorpions. Unless there was really no other way, they would not send the children here or abandon them outside this tower.
If people outside were not helpless, they would not provoke this group of weird people.
In the Mage Tower, the two sages didn't know how to enlighten Yaxi.
Purpose: Growth is always accompanied by giving up part of yourself