There are a few reasons why tarot cards may not work. The first reason is that tarot cards rely on superstition and intuition, which can be unreliable methods of divination for distracted or beginner readers. The second reason is that the interpretation of tarot readings is highly subjective, so different readers can often give different readings for the same deck of cards. Finally, many people believe that the outcome of a tarot reading is predetermined, which means that the reading cannot be changed by the actions of the person receiving it.