The man freed of cave illusions would rather be a poor servant of a poor master in the world of Truth than a high potentate in the cave world of ignorance and deception.
If the freed man returned to the cave, he would no longer be able to compete with the "shadow people" in comprehending their shadow images. They would say of him that his ascent to what he calls Truth has ruined his discernment; that the fantasy of trying to ascend to what is called Truth is dangerous, to be avoided at all cost.
If a freed person tried to help a "shadow person," the other "shadow people" would try to capture and murder him.