Why do we wear clothes? Genesis!
While the Bibles account of the flood is one of judgment, it is also one of mercy and salvation.
If we discount the account of creation, we remove the significance of Christmas.
We need to attack the false foundation of autonomous human reasoning that leads to evolution and millions of years, and proclaim that God's revealed Word is authoritative and its history of the world is foundational to Christian morality and the gospel of Jesus Christ.
What you believe about who you are, where you came from, affects your whole worldview.
The creation message has matured over the past three decades, as the discernment and understanding of creationist leaders has matured. More and more, the emphasis is on the foundational issue: compromise of Genesis ultimately undermines the gospel itself.