I would be more interrested in what such a person could tell about myself... if they are any good at it.
Cause it seems that most of their gift is that, being able to see what people are.
Then I believe in auto-persuasion.
If the tarot girl is good enough, she should be able to help me persuade myself having more optimisim for my goals for example, or help me being less lazy or anything of a mental self persuasion thing that help you overcome things easier.
All of the rest is hit and miss and when you think it works, it's only because you tend to lie to yourself and don't want to be very clear in distinguishing reality from desires...