Well, many evangelicals who otherwise believe in the inerrancy of the Bible and who might generally agree with the sufficiency of Scripture have nonetheless embraced the area of our faith and life at some level.
Some things it talks about explicitly, like salvation or sanctification or marriage or elders.
(insert crickets, tumbleweeds, person whistling here).... While the principles supporting biblical dating have their beginnings with the very structure of the family, modern dating has its origins with the sexual revolution of the 1960s.
It is brand new, and yet, seemingly, it is all we know. Here are some fundamentals: Modern dating philosophy assumes that there will be several intimate romantic relationships in a person's life before marriage.
My point is that we cannot simply state that the Bible "doesn't mention dating or courtship," and then think we're off the hook to pursue this area of our lives either on the world's terms or however seems best to us without diligent, submissive reference to God's Word.
If the doctrine of the sufficiency of Scripture is true, then God's Word does have authoritative guidance for us about how we might best glorify God in this area of our lives.
I certainly agree with the inerrancy of Scripture, but that's not what I'm talking about here.