Wolves practicing magic remedies survive on grasslands of foolishness

The wolves and vultures practicing magic remedies, the practitioners of tricks and untested and uncontested medicines and treatments, the quacks, the sorcerers, occultists and fake preachers earn their success on the universal truth that majority of all the sick and ill would heal by themselves with little effort and time and most of those in despair and melancholy would also come out of it by themselves helped by time. That is how these rogues continue to steal credit for themselves and for the fake knowledge they claim to practice. 

And those few who remain unhealed physically or mentally despite visiting these thugs either blame themselves or are too minuscule in numbers to be of any significance to bring disrepute or suspicion over acts of these quacks, and fake healers. Their glory thus continues because the world is mostly full of fools.