Most people don't WANT to believe because it scares them. A lot of people don't believe because they are to closed minded. The fact that you're asking shows that you are at least open minded, a good thing
What people need to understand is that there are dishonest people in all walks of life. There are guys who "pretend" to like a girl, but they are just trying to get sex. There are attorney's who LIE to win a case, there are people who get injured on the job, but pretend to be in more pain than they are to not have to go to work (which has made the Workers Comp system SO bad that they treat EVERYONE like they are faking!).....you see where I'm going with this? And YES, there are people who pretend to be psychics. BUT, there are guys who actually don't want to use girls for sex, attorney's with integrity, people who are truly injured and gifted psychics. How do I know? I had never been to one until 3 yrs ago, because I didn't want to go unless I knew someone who went to one that was legit. My friend went, told her things that no one could have known, so I went. I tested her, and she blew my mind. I asked who robbed my house (which I didn't even know at that point) and she told me. I found out later it was true!! Btw, she has helped police officers solve crimes: murder, child molesters, and more! You don't have to believe me, so I challenge ANY non-believer to look at reviews for psychics in their area, find one who is legit, and go. They will walk out a believer. I have sent friends and relatives to my psychic -some believers, some not - and they walk out of there in shock! It's actually pretty funny to see their faces
Also, I have had "stuff" happen to me since I was a child, and I recently decided to tap into it by taking a class on "Practical Intuition". What I have learned is that sometimes the way the spirits send messages (can be a picture, a vision, a word, or, best case scenario - a voice) can be confusing. I have had SO much happen since taking this class, and some of the visions I didn't understand and had to ask my teacher. So if a psychic gets it wrong, it doesn't necessarily mean they are fake, they could have misunderstood the way the message came through. EVERY psychic will misunderstand a message at some point, so when a well known psychic gets something wrong, the non-believers will jump on it and all you will hear is what the psychic got wrong, not the thousands of things she/he got right. I'm not taking the class to become a paid reader, btw. I have an injury that has kept me in chronic pain for 2 1/2 yrs, and I wanted to learn how to meditate and heal myself, since the doctors can't do anything but give me meds. Since I've started, I have slept better than I had since the accident (I was waking on average of 2-3 hrs a night!), I feel more calm (stress causes tension, which causes muscle spasms, which makes the pain worse), and my pain level is down. Hey, whatever works! Hope this helps you to understand a bit more