The point is that of all possible stories, I chose a certain one. Because it is human nature to project unconscious material onto objects in the environment. We always see reality through a lens made up of our own inner state. Therapists have long noted this tendency and have created tools to assist in the process. The famous Rorschach inkblot test is based on such projection.
Projection is one reason why the tarot cards are valuable.
Their intriguing pictures and patterns are effective in tapping the unconscious. This is the personal aspect of the tarot, but the cards also have a collective component. As humans, we all have certain common needs and experiences. The images on the tarot cards capture these universal moments and draw them out consistently. People tend to react to the cards in similar ways because they represent archetypes.