What good is listening to another human being speaking, when it is so easy to misunderstand what they are trying to say? What they are saying can be the beginning of a conversation where we can clarify with the speaker what they really think.
Likewise, scriptural statements are starting points for conversations with God, where we work out what He was trying to say, if we are open-minded. But just as in human-human dialogue, where we can be stubborn and resistant to understanding what the other person is saying, so also in nutting things out with God.
God is not looking primarily for each of us to instantaneously download marching orders and then head off and do as we are told. He is more interested in developing a relationship with his children, which means presenting things in a way that we need to keep coming back to him for clarification. Ambiguity is not necessarily a bad thing.