I'm with you 95% of the way. Fraudsters are taking advantage of people, but there are professional psychics out there that sincerely have a gift.
I was actually in a good place when I saw that old lady. I was mostly motivated by curiosity, it was someone my grandmother had known years earlier. I don't want to get too personal about the experience, but when Is say she wasn't vague I mean she told me things like "your girlfriend is pregnant" which I didn't believe then but turned out to be true. It all turned out to be true.
All I really got from going is the knowledge is that the knowing is worthless.