I think with experience some people can guess future pretty well. Go find a gypsy she will tell you your future lol. Given an event (a guess) we immediately try to predict its probability. It gets harder to predict complex conditional probabilities because of .. see below.
The problem comes with guessing the details (particular events) of the future.
To your question, would you rather know or not know your future.
Unknown gives hope which is better than no hope at all. Most people would choose hope, including myself.
So, not to know my future is my answer.