Know how Prithviraj proved Kalabhavan Shajohn's perceptions wrong

Kalabhavan Shajohn has just released his debut directorial  Brother's Day for Onam. He had already revealed that it was his film's hero Prithviraj who motivated him to wear the director's hat. However, he says that many from the industry had warned him about how Prithviraj would interfere with his work. But all the premonitions were proved wrong and he understood that Prithvi knew his craft when he directed Lucifer that also starred Shajohn. Also, he asserts that Prithvi never interfered with the script or direction. He even decided that if Prithvi were to advise him on anything, he would gladly accept the ideas.