Sorry, my goof. Let me rephrase.
"If he can see the doors I have to choose from why can't he see which one I WILL go through? Someone draw the curtain?" g
Perhaps because you haven't chosen yet.
Consider Laplace's demon. A demon that is aware of all causes in an individual life and so can predict that future because of an unbroken causal chain of events.
Laplace's demon - Wikipedia, the free encyclopedia
The demon can precisely predict your future however you still freely make the choices. The demon just happens to have enough knowledge to predict those choices.
So an omniscient entity would know your future because they could predict your choices. Now going forward your future is set and will be the result of the choices you freely make. However lets say humans have been given a unique ability to break that causal chain leading to a destiny determine by your freely made choices.
You can choose to accept God's will over your own. That choices alters what would have otherwise been your destiny. God has not predetermined this decision for you. It is a first cause act. Instead of relying on your own values and desires to make your decisions which would have otherwise led you to a certain destiny you've made the choice to accept God's will over your own and allow God's will to determine your destiny instead of your own.
So really then you'd have two potential destinies. One according to your own will and one according to God's will. You can continue to act according to your own will and live with the results or submit to God's will accept your destiny according to God's plan.
Muslims seem to understand this concept of submitting to God's will. Christians forfeit their life to Christ. "Thy will be done".
Since the decision to submit to God's will is totally up to you, your future is not yet determined. However there are only two potential futures. One of your own making and one of God's making. You are free to choose between the two.