To be honest, neither River nor Pearl specifically required such detailed protection, though they appreciated it. They had not spent decades building a cultivation family, nor did they have any legacy they were leaving behind, so their attachments weren't that great.
River still had his parents here, true, but he was hardly an only child and his parents would do fine in his absence. In fact, giving them wealth and power would do them more harm than good.
At the moment they were well settled in their environment, but if they quickly rose to prominence and gained a lot of attention, they might now even know how they were taken advantage of. Once the three generation protection period expired, no one could say for certain how long they could last. There was also the fact that River was the one pretending to be a descendant of the Sunborne family, so if he revealed his true parents the discrepancy would immediately be noticed.
