Even for people who have some understanding of the traditional meaning of the tarot's symbolism, it is useful to approach this exercise with a new eye, to talk about the feelings engendered by the card rather than to fall back on what someone has said the card means. This could be likened to the difference between interpreting our own dream symbols and using Zolar's Dream Dictionary. I once watched two friends, one of whom had drawn The Star, and the other who had drawn The Fool, first remark, independently, how they hated their own card and loved the other and then touch deeply on the qualities they saw in one another. This is only one way in which the tarot can be used to work with dreams. There are many more to explore.
Dreams are the realm of imagery and symbols.