Christ spoke in parables to call us our of our slumber, see in Matthew 13 how the hearts, ears and eyes have become unable to bear the word of God plainly, as we do a news report, the parables are not hard to understand ( sometimes with a little help) for those with ears to hear but for the deaf and blind and awaking of faith, an acceptance of the gift of grace is needed, saying "yes" to grace takes many forms. If the parables are perfectly understandable to the chosen, why do they need pastors, bible studies, commentaries, concordances etc? It's because He is giving us a chance to say "yes" at the most basic level, I want to understand, help me understand Lord! This is another reason He gave us a Church before He gave us the canon of Scripture. The heirs of the apostles help any today who want to hear and see.
Where in the bible does it say that all men are given an "informed" choice?
If Christ had chosen to fully inform everyone, then he would not have spoken in parables. He specifically stated that his purpose in speaking in parables was so that some people would be left in the dark, "lest at any time they should see with their eyes, and hear with their ears, and should understand with their heart, and should be converted, and I should heal them."
Christ spoke in parables to call us our of our slumber...
That is not what Christ said. That is YOPIOS.