Do you have grounds to say people's belief is absurd? Some believe, others don't, it doesn't give you or anyone the right to call someone/something absurd, especially when you do not back up your statement with some type of facts.
There are various fortune telling methods. Most [if not all] can be done by the person asking the question. You should not pay for a 'psychic reading' for a number of reasons, but for fun, a way to ease your mind or make a choice, it's harmless. The future is always changing, but when someone is lost, a reading can help calm and direct them.