For Immortal Jiuyi to recruit Chu Liang was not unusual after all, as this would typically happen after the Immortal Sects conference. The young disciples cultivated by the sects would generally enter a new phase.
Some of the selected few were favored by the sects and given more resources for special cultivation, playing crucial roles; the majority had to find their own way to gain cultivation resources, and journey through life.
It was somewhat analogous to a "graduation".
Changing allegiances afterwards was not uncommon either. Those who committed to other sects were mostly seen as immediate combat power, but they were not the same as homegrown, cultivated talents.
Someone like Shang Shuwen from Shu Mountain, who managed to become a leader of a peak, was considered an exceptional success story.
Those who were not cultivated from a young age in a certain sect were unlikely to occupy high positions like Sect Leader or Zhenshan Elder.