The average secular Zennist is close to believing that giving free rein to their thoughts and urges is the Way even when doing zazen. This is living in the here and the now. It is a kind of naturalism in which Zen's lifestyle is derived from nature.
People who find the soul of Zen to be found in naturalism don’t see Zen Buddhism as a means towards a mitigation of man’s spiritual ignorance including a mitigation of his natural desires which can easily cause him to lose what is characteristic of human beings: a kind of slow descent into the abyss.
With this kind of naturalism getting inserted into Zen, no longer do spiritual explanations of Zen suffice. They are treated with a quiet contempt as if Zen has only been about a special kind of naturalism, almost like Taoism, in the example of Zen laymen Kanzan and Jittoku who supposedly lived during the Tang dynasty (618-906).
Both Kanzan and Jittoku lived what you might call an unfettered lifestyle. They were neither bound to Buddhist monastic rules nor the secular world with its unending demands. According to Zen master Bukan 豊干 both had realized Buddha-dharma and to a much greater degree than the monks in his monastery.
Whether or not this is fiction or based upon real historical figures doesn’t matter. What is of concern is to misunderstand and appropriate Kanzan and Jittoku, and even Bukan as representatives of Zen naturalism hoping to sidestep Zen’s underlying demand that we must intuit our true nature, this being kenshō.
Without the demand of kenshō this naturalism will eventually collapse into a kind of ontological nihilism in which there is no-truth-all-the-way-down which appears to be endemic in postmodern culture.