So basically having your fortune told is being told of various possibilities and events that befall everyone. I guess sometimes people need to hear it to find comfort and hope. I don't see why fortune tellers these days can't just go with that angle:

"what I am about to tell you is what befalls everyone at some point in their lives. This may happen to you some day or maybe it won't but know of these things so you may always be prepared." - turns on fog machine