I have always had a very negative attitude toward astrologers and fortunetellers. The gifts we receive, the talents we are given on the path, are given to us for the purpose of truly helping others, not for personal gain and not for parlor games or for self aggrandizement. Should someone have those talents and mis-use them, I believe they are lost to that individual, who then has to rely on a good knowledge of human nature and the ability to read the face, posture and voice of those they read for.
Are "psychics" picking up on something? Yes, at least the good ones see "shadows of what might be." Is it set in stone? No. Unfortunately, it is so often a trap for the Ego and the “psychic” loses any ability they had to perhaps help people to guide their lives on their individual road maps. If one is given the power to do good and uses it for their own benefit, they will incur karmic debt that will be painful. It is not a punishment per se; it is simply the law of cause and effect in practice. If a child puts his hand on the stove and is burned, it is not punishment for doing what he was told not to, it is simply the result of touching something hot. All our lives we are being taught this particular lesson. It is a good idea to think through an action that affects others before proceeding.
Because we have free will within the road map we are born with, it is not possible to predict events with any kind of certainty, only to glimpse the possible consequences of following the road the client is currently on. The great danger with Astrology is of self-fulfilling prophecies. Predictions that come true because of the client's belief in the fortuneteller, store up karma for the fortuneteller to work off in future life times. That is a responsibility I would not care to carry, or a debt that I do not care to incur.
I have had far too many experiences to dismiss it as nothing, but I do refuse to either read or be read for. I find that my connection to the All provides me with guidance and answers when I listen. I try very hard to simply carry a lamp to light the path and a mirror to reflect each person's own truths.