Jeffro
Our interpretation is based on Scripture and harmonizes well with the historical evidence, it is simple and not convoluted. Your hypothesis which has some agreement with scholars is based on higher criticism which denies the Bible as God's Word. I would rather have a belief system that has the approval of God than a belief system that is based on human reasoning.
My experience with you in the past is that you have no interest in what is published in academia so it is fruitless in supplying details about what current scholarship is sayiong about the date for the Return and just to muddy the waters for you, the date which has been proposed is 535 BCErather than 538 BCE.
scholar JW