Conservatives should understand how foundations are necessary. You cannot understand the depths of the NT without undestanding the OT.
It's the other way around. God came to teach. Matt 11:26-27
"Yes, Father, for this was your good pleasure.
“All things have been committed to me by my Father. No one knows the Son except the Father, and no one knows the Father except the Son and those to whom the Son chooses to reveal him.