IMHO, this fortune telling thingy is not for everybody, it requires affinity or whether you are meant to have such experience in current lifetime
When you have such affinity, obviously the reading will be way more accurate than those who don't
Just like ghostly encounters - some people are easier to have one (have affinity) and others simply don't no matter how hard they try
Of course not discounting the fact that there are bad actors & fake ones out there as well