As in Taro Cards. One can't help but notice Tarot Card readers on every street corner now days. Do they all know the future? I think not. Rather the cards act as a psychological trigger device to delve into ones own sub-conscience. Once you have so delved it doesn't take much to come up with something interesting to say about the patient.
I agree, some people have uncanny powers to know things. The cards are just a means of focusing one's intuition. It could also have been tea leaves in a tea cup or a crystal ball or a fire place at midnight.
The lesson is to search for someone who has something to say. Not search for a Tarot Card reader as such.