"Sect Leader, the reward offered by the Taiyi Immortal Sect is indeed generous, but if we do this, the other nine sects won't just let it go. They won't allow us to stir up trouble in the Coral Sea Region. Pull one hair, and the whole body moves. Sect Leader, please think twice."
The South Sea had dozens of sea regions, and the Ten Great Sects were the overlords of the South Sea. In most sea regions, each side had a hand in the others' territory; they checked and competed with one another. The Ten Great Sects had an unwritten rule: outside powers were not permitted to open up territory and expand in the South Sea. They could establish branch rudders to do business, but they were not allowed to carve out lands and expand. Violators would be attacked by the other powers.
The South Sea had the richest Cultivation Resources. Fertile water was not allowed to flow into outsiders' fields, so the South Sea's Ten Great Sects naturally did not want outsiders to seize their resources. In addition, if outside powers opened up territory in the South Sea, it could very easily lead to a great war between the Ten Great Sects. The Ten Great Sects all had many vassals, and naturally would not sit by and do nothing. Once the Ten Great Sects began fighting, it would be equivalent to giving the Demon Race an opportunity.
Several thousand years ago, it was precisely because the South Sea Cultivation World had fallen into chaos, with the various powers attacking one another, that the Demon Race had launched a massive invasion. The human race had paid a tremendous price before finally repelling the Demon Race's offensive.
This was a warning cart overturned before them; later generations had to take it