Is There a Computational Reason Why Prediction Is So Difficult?

If I had a massive data set of every resume that I looked at for Google, could I then build a system with a better chance of prediction? Prediction is always going to top out at some number based on the fact that we're humans and we're inherently unpredictable. If you have bigger and more data, you could push the accuracy up a little bit, but it's still going to talk about a level that's pretty unsatisfied.