All truth is desirable but it is not all essential to childhood or salvation. Error is like disease, all of which is undesirable but not all of it is fatal. We must learn to make distinctions so we can tell the difference between seed which produces life and meat or bread which sustains it. Many people lived and died before either germs or vitamins were discovered. All who have been born again have come by life in the same way, through faith in Christ and obedience to His will.
Obedience always involves the human element of intellect and ability.
One's faith may be perfect and his knowledge defective and his obedience incomplete. God's grace covers us while we are in the process of growing up spiritually and while we make many mistakes in judgment and hold many errors of the intellect. If this is not so, heaven will be a lonely place. If God loves us and accepts us as children in spite of our defects and failures, then we must accept our brethren in the same way.