It seems that there are Christians who consider the question of origin/the biblical doctrine of creation to be a less important element of the Bible's teaching than, say, the texts directly concerned with salvation.
This thinking is half-baked at best. Is it not important to salvation that we know
who God is? He establishes his identity by
his being creator, and not some creator that is melded with the
creation, that various process theories (e.g. theistic evolution) would
require, but one who is sovereign over creation, sub-contracting none of
it to mediating factors.
The misconception I refer to above also misunderstands the Bible. It is not finally about salvation,
this is just a way station to God's kingdom coming, and the creation
sets the scene meaningfully for the great arc of scripture from
creation, through fall to resurrection and the new creation. The setting
fragments into meaninglessness if God's authorship of creation is
other than he sets out, because then we have no idea what it is or who
God is, or how he is distinguished from the creation.