For me, I don’t believe in a young Earth. If you do, fine, but with the science favoring an old earth and the related science I cannot come to that conclusion. Add in how the Church has said we aren’t necessitated to a six-day Creation, I see no reason to deny the evidence. It would be akin to me to say ensoulment doesn’t occur at conception in favor of delayed Humanization as some of the early theologians held.
But at the same time, not taking Genesis as literal history doesn’t cause me to throw it away. It causes me to appreciate it more. To see Creation and how Genesis contradicted other creation stories of Sumer helps emphasize the Truths it teaches. Unlike Sumerian lore, Earth was not an accident. It was intended. Man was not made to be slaves, but to be loved. And God is the one who did it.
With the Flood, again those contrasts are great. God controlled The Flood. He wasn’t scared like the Sumerian gods who fled it. God didn’t send it as population control. He told us to be fruitful and multiply. And He gave time for those that were wicked to repent and be saved. He didn’t loose punishment without warning. And by water clearing away the wickedness of the world, we have a preamble to baptism.
If I insisted on a literalistic interpretation, I would miss those. If I dismissed the billions of years from the beginning until now, I would miss just how awesome God’s power is. (Truth be told evolution amazes me more at God’s handiwork than a literalistic Genesis interpretation.)
And when I see Fundamentalists who insist a person must take Genesis literally, I pity the poor souls that saw the evidence against a literalistic interpretation and were faced with the false dichotomy of God or Science. When instead they are compatible. Because for me, not taking Genesis literalistically doesn’t weaken my faith. It strengthens it.