What you posted there was really my point to your earlier posts.
Spiritual authority comes from above by the Spirit. We know there are many false teachers out there that are counterfeiting the real thing and then there are also many that are simply ignorant and care not to grow in knowledge of the Lord.
My point in the thread using Paul as an example was that it is not wrong to dispute and argue God's word as long as it is done in the right heart. The intent of such is greatly respected. It is not about strife and contention at all, but growing in knowledge of God. As His saints, we desire what God desires.
Even a wise man will welcome reproof and instruction, yet if a man is not wise, he doubtfully will not welcome it, nor will he be grounded enough to discern the source and intent behind it.