Who says psychics have an easy life? Their abilities are always offset by endless trouble. And in this case, the film is absolutely authentic. At least, quite sparing for the audience, which itself can't see the future and has a poor idea of the difficulties it involves.
No horror film has ever made me shudder with fear for a whole hour and a half. Not one. And that fear isn't from mysticism or the fact that a dead Katie Holmes with one eye is looking down at you from a tree.
A husband who beats you half to death and fears no one because no one is his law. Raising three children without a father in a town where everyone thinks you're a witch. Trembling for their lives at every rustle, afraid to pick up the phone because you know it's going to be bad news. Trying to get along with a psychopath who fixes your car and lends you money, but might burn your own father alive and you in addition.
That's what fear is.
And no special effects will make you more afraid than what happens in this murky psychic reality.