Because the monarchy had confidence against the Government's military dictator Field Marshal Thanom and prabhas including field marshal does not rely on behavior of Colonel Narong attain power, which is considered the political heir of field Marshal Thanom.
The monarchy has lost confidence in the military dictatorship of Chom Phon Chom Phon preservation and illumination. Including mistrust toward abuse of Colonel Narong, a political heir of Chom Phon care anymore.
Because the monarchy has confidence in the military junta of จอมพลถนอม, and จอมพลประภาส. Abuse one's authority and trust on behavior of Colonel narong, which is considered the heir apparent of field marshal thanom again.