Yeah, Niki did the cultivator stuff way soon. First book should have been about poma and only poma with hints towards cultivators outside. Second book could explore about cultivators while MC is strong enough to actually have a say in it. Still, only cultivators below NS can enter poma and Niki can create an excuse that only relatively weak S and strong X are sent by the big sects and clans. Something like accumilating multiple strong cultivators will overload poma or something.This is actually true.
Honestly, at the end of the day, I just wished that all the cultivator stuff would appear only when the MC was like a Shangtian, because as of right now, and heck, even when the MC becomes a Xiantian, I really doubt they would have any sort of agency against these people.
All the MC will be doing right now is being used as a glazing tool for them