Do you see the problems here? Without being all knowinfg and infallible you have absolutely no way of determining whether or not one particualr interpretation is correct or not. This is also what I meant with "people pick and choose from the bible". Since none of them can know whether or not their interpretation is valid, none can claim TRVTH. Yet somehow, they all do.
The problem is that many people do not obey the little amount of light from God they do get from the Bible. So God does not waste His light on someone He knows is not going to respond.
For example, say a Bible reader is living in fornication. He is sleeping regularly with a woman who is not his wife. Now say this man opens up to read some things in the Bible. A particular portion seems to speak to his conscience as he reads through Genesis.
Perhaps these words seem to leap off the page and speak to him in a personal way:
"And Lamech took teo wives for himself ...".
The man has a sense that he is being watched. He is convicted of his lustful living by this one passage. But instead of asking God for forgiveness and help to break out of his sin, he sweeps it under the rug. He determines that he will continue to live in fornication anyway.
The next day he also picks up the Bible and complains that there aer too many interpretations. "This person has one opinion. That person has another opinion. Who knows who is right? The Bible just is a big mystery with some many interpretations."
He goes to Christians and complains that the Bible has too many interpretations.
However, when the Holy Spirit spoke something to him from the Bible he did not allow it to touch his living. He hardened his heart. He would not acknowledge that he was a sinner in need of forgiveness and repentence.
Because he did not walk in the light that God did grant him, perhaps God will only give him a blank stare now when he reads the Bible.
One should be in fear of this situation:
"And He said to them, Take heed what you hear. With with what measure you measure, it shall be measured to you, and it shall be added to you.
But he who has, it shall be given to him; and he who does not have, even what he has shall be taken away from him." (Mark 4:24,25)
Too many assume that the word of God is given simlpy to tickle our intellectual curiosity about creation, floods, boats, migrations, populations, etc.
If you walk in the light that God speaks to you from the Bible He will grant you more understanding. If you come to the word of God just seeking information that will not touch your life but is merely objective curiosities, you may become more blinded.
It is good for a person frustrated with different interpretations to pray "Dear God, what HAVE you spoken to me in the past that I did not give heed to? Take me there again. Bring back to my rememberance your speaking."