Should we consider the agnostic, the one who has doubts about the existence of God as we would an atheist or a prodigal?
God’s intent is for every person to make their way to him and find him. When a person searches for God with all their heart they will find him. He promises Israel that would be the case when they were in captivity in Babylon and he promises the individual the same thing.
Maybe the answer to the question is that some agnostics are more like an atheist and some are like the prodigal son. God is there and if they look for him, they WILL find him.