Education and guessing can't go in same sentence, education is experience and years of learning, guessing is pure gambling. I'm sure that educated traders have mistakes, no one make profit on every trade, but I would not say that they are guessers.
I often see the mentioned that only 1% of forex traders manage to make profits for a long period of time. What this shows is the fact that while it IS possible, it isn't as easy as a lot of people would have you believe. Only the best of the best earn enough to live off and it takes years to get to that point.
This information shows that with guessing you can't make profit just with wild guessing, I wonder how many percent of gamblers make profit, more then with trading? At least couple more percents I'm sure.