Every part in a machine has a function that relates to the whole.
In a modern Computer, there are thousands of data paths, and often billions of diode junctions, being switched low or high all very coherently. Millions of operations per second, and not a single one can be tolerated to go wrong... to express its individuality.
Society cannot afford to have every young fool decide that Life and Society are Existential Vacuums and that the only Exercise of Free Will that is possible is Suicide (the European Existentialists actually arrived to that End of Philosophy, and lucky for the Rest of us, its leadership was consistent enough with their own beliefs so that no one was left behind to sufficiently convince the Survivors in our Society of the compelling cogency of their arguments.
There had been a very accomplished Artist of the Renaissance... I believe he was Rapheal. he was complimented upon being the Greatest Artist alive, indeed the Greatest of all times. But he was a humble man and countered that he was only a midget sitting upon the shoulders of Giants... that something needed to be said for all those from whom he learned, from all those who had invented and improved the tools he used, the theories he applied.
So it is with Customary Beliefs and Social Traditions. Civilizations rise on the Quality of their Customs, and Fall because of their Flaws. So a Society must do all it can do to IMPROVE the ambiance of its Customs, the Quality of its Traditions. But to throw it all out and let each generation stumble around REINVENTING THE WHEEL AT EACH GENERATION. Well, maybe only European Existentialism is a more Suicidal Idea.
An imaginary entity is not actual, but it can be real in every sense. The invisible being known as god and any other gods for that matter, are not indelible. They are not true. What is normally regarded as sanity in operation and the feelings and egoes of people are learned or conditioned. Behavioral conditioning is meant for the purpose of rearing the body to grow to believe in an arbitrary definition of success that may not suit us. We must free ourselves from the beliefs of others.