The idea that man is a tabula rasa, or Mao's sheet of blank paper upon which the most beautiful characters can be written, is an old one with disastrous implications. I do not think though that the cults you mention could survive honest thought about human nature.
Polish what you polish until it is like gold that has been refined a hundred times; anything that is done in a hurry is not deeply developed. Do what you do like a thousand-pound catapult; one who pops off too easily does not accomplish much.