And how, exactly, do you know what God wants if the Bible is ruled out as untrustworthy?
Well, which is it now: a divinely-inspired text or a product of chauvinist cultures? They seem rather contrary to me. And how do you decide what is divinely-inspired and what is not? As soon as you make yourself, or some other human agent, the final arbiter of what parts of the Bible are and aren't divinely-inspired, the Bible is emptied of its authority, becoming nothing more than a mirror of the social and moral preferences of the people and times in which it is read.
And it would be different still if adolescents had written it, or children. God, however, is the Author of Scripture, not men, women or children.
Sinners often find the ways and commands of a holy, sovereign God abhorrent. And it is a gross misapplication of Old Testament scripture to ask a New Covenant believer if he adheres to laws of separation given solely to the Chosen People of God, the Israelites.
Is-Ought fallacy.
Selah.