Tarot can lead you and tell you what is best for you?
How cards do that?
I think it is only superstition, tarot is useful only for fun. But, what cards "tell" you can change your thoughts and thoughts can change your behavior, behavior can change your so called "destiny".
In fact, there is no "destiny" or "talking cards" or horoscope or magic etc., it is only your beliefs encourage your action.
As Henry Ford said; "If you think you can, or you think you can't, you are right."